Researcher Database
KATORI Hiroko
| ■Faculty | Institute of Engineering Division of Advanced Applied Physics | |||
| ■Position | Professor | |||
Last Updated :2023/09/18
Activity information
Name and contact details
Name
カトリ ヒロコ, 香取 浩子, KATORI HirokoE-mail
h-katori
cc.tuat.ac.jpExternal link
http://www.tuat.ac.jp/~katori/indexEng.html
Affiliation / Position
Institute of Engineering Division of Advanced Applied Physics, Professor
Other affiliation
- Faculty of Engineering Department of Applied Physics and Chemical Engineering
- Graduate School of Engineering Department of Applied Physics
- Graduate School of Engineering Joint Doctoral Program for Sustainability Research
Research History
日本学術振興会 特別研究員
From 01 Apr. 1988, To 31 Mar. 1990
東京大学物性研究所 助手
From 01 Apr. 1990, To 31 Mar. 1995
理化学研究所 磁性研究室 研究員
From 01 Apr. 1995, To 31 Mar. 1998
理化学研究所 磁性研究室 先任研究員
From 01 Apr. 1998, To 31 Mar. 2007
埼玉大学 大学院理工学研究科 客員助教授
From 01 Oct. 1998, To 31 Mar. 2008
東京大学教養部 非常勤講師
From 01 Apr. 1999, To 30 Sep. 1999
東京大学物性研究所 客員助教授
From 01 Apr. 2005, To 30 Sep. 2005
独立行政法人理化学研究所 高木磁性研究室 専任研究員
From 01 Apr. 2007, To 30 Sep. 2010
埼玉大学 大学院理工学研究科 連携准教授
From 01 Apr. 2008, To 30 Sep. 2010
東京農工大学 大学院工学研究院 教授
From 01 Oct. 2010
Education
- Ochanomizu University
Faculty of Science
Department of Physics
To Mar. 1984, graduated - Ochanomizu University
Graduate School, Division of Natural Science
物理学専攻
To Mar. 1986, completed, master course - Ochanomizu University
Graduate School, Doctral Research Course in Human Culture
人間環境学専攻
To Mar. 1990, completed, doctor course
Degree
Research Areas
- Natural Science, Magnetism, superconductivity and strongly correlated systems
- Nanotechnology/Materials, Inorganic materials and properties
- Nanotechnology/Materials, Applied physical properties
Research Interests
Teaching Experience
- 化学物理数学
2021, 専門科目等 - 電子物性工学
2021, 専門科目等 - 物理工学実験
2021, 専門科目等 - 先端化学物理工学概論
2021, 専門科目等 - 【1063500010】 応用電磁気学
2021, 専門科目等 - サステイナビリティ研究基礎B
2021, 専門科目等
Grants-in-Aid for Scientific Research
- 基盤研究(C)
多形磁性体における相制御の機構解明と磁気応答機能の探索
From 2021, To 2023 - 基盤研究(C)
化学圧力で相制御可能な多形磁性体の創製と磁気応答機能の探索
From 01 Apr. 2018, To 2021 - 基盤研究(A)
ベクトル電場波形整形パルスによる時間反転対称性の破れた量子系の生成と制御
From 01 Apr. 2017, To 31 Mar. 2018 - 基盤研究(A)
ベクトル電場波形整形パルスによる時間反転対称性の破れた量子系の生成と制御
From 2016, To 2016 - 基盤研究(A)
ベクトル電場波形整形パルスによる時間反転対称性の破れた量子系の生成と制御
From 2015, To 2015 - 特定領域研究
スピン・電荷・格子複合系における幾何学的フラストレーションと機能
From 2007, To 2011
Papers
- Spin-glass transition in the spin-orbit-entangled J(eff)=0 Mott insulating double-perovskite ruthenate
Yatsuzuka, Hayato; Haraguchi, Yuya; Matsuo, Akira; Kindo, Koichi; Katori, Hiroko Aruga
SCIENTIFIC REPORTS
NATURE PORTFOLIO
We have successfully synthesized new Ru4+ double perovskite oxides SrLaInRuO6 and SrLaGaRuO6, which are expected to be a spin-orbit coupled J(eff) = 0 Mott insulating ground state. Their magnetic susceptibility is much significant than that expected for a single Ru4+ ion for which exchange coupling with other ions is negligible. Their isothermal magnetization process suggests that there are about 20 percent isolated spins. These origins would be the Ru3+/Ru5+ magnetic defects, while the regular Ru4+ sites remain nonmagnetic. Moreover, SrLaGaRuO6 shows a spin-glass-like magnetic transition at low temperatures, probably caused by isolated spins. The observed spin-glass can be interpreted by the analogy of a dilute magnetic alloy, which can be seen as a precursor to the mobile J(eff) = 1 exciton as a dispersive mode as predicted.
14 Feb. 2022, Research paper (scientific journal), joint, 12, 1, 2045-2322, DOI(公開)(r-map) - Honeycomb lattice iridate on the verge of Mott-collapse
Haraguchi, Yuya; Katori, Hiroko Aruga
JOURNAL OF PHYSICS-CONDENSED MATTER
IOP Publishing Ltd
A new honeycomb lattice iridate (La,Na)IrO3 (approximate to LaNaIr2O6) is successfully synthesized from the spin-orbit coupled Mott insulator Na2IrO3 by replacing the interlayer Na+ ions with La3+ ions. (La,Na)IrO3 shows a finite Sommerfeld term in heat capacity and a -lnT dependence of resistivity, indicating a realization of a metallic state driven by a Mott collapse. Furthermore, crystal structure analysis reveals the formation of Ir zig-zag chains with metal-metal bonding, increasing kinetic energy resulting in the Mott collapse. This observation would be due to a Mott collapse induced in a J (eff) = 1/2 spin-orbit coupling Mott insulator with an Ir honeycomb lattice by topochemical control of the ionic configuration.
16 Nov. 2022, Research paper (scientific journal), joint, 34, 46, 0953-8984, DOI(公開)(r-map), 465602/1, 465602/7 - Perfect kagome-lattice antiferromagnets with J(eff)=1/2: The Co2+ analogs of the copper minerals volborthite and vesignieite
Haraguchi, Yuya; Ohnoda, Takehiro; Matsuo, Akira; Kindo, Koichi; Katori, Hiroko Aruga
PHYSICAL REVIEW B
AMER PHYSICAL SOC
We report the synthesis, crystal structure, and magnetic properties of Co2+ kagome magnets Co3V2O7(OH)(2)middot2H(2)O and BaCo3(VO4)(2)(OH)(2), which can be recognized as Co analogs of the intensively researched quantum kagome magnet volborthite Cu3V2O7(OH)(2)middot2H(2)O and vesignieite BaCu3(VO4)(2)(OH)(2). For each compound, the ground state is seemingly A-type antiferromagnetic order. At low temperatures, applying a magnetic field causes a metamagneticlike transition described by the transition in which antiferromagnetically aligned canted moments change to ferromagnetically aligned ones. These ground and field-induced states include a canted ferromagnetic component perpendicular to the kagome planes favored by Dzyaloshinskii-Moriya interactions. These magnetic properties are well characterized by the J(eff) = 1/2 physics. Our findings will be a step toward clarifying the J(eff )= 1/2 kagome physics, which has not been thoroughly studied experimentally or theoretically.
19 Dec. 2022, Research paper (scientific journal), joint, 106, 21, 2469-9950, DOI(公開)(r-map), 214421/1, 214421/8 - Quantum paramagnetism in the hyperhoneycomb Kitaev magnet beta-ZnIrO3
Haraguchi, Yuya; Matsuo, Akira; Kindo, Koichi; Katori, Hiroko Aruga
PHYSICAL REVIEW MATERIALS
AMER PHYSICAL SOC
A polycrystalline sample of the hyperhoneycomb iridate beta-ZnIrO3 was synthesized via a topochemical reaction, and its structural, magnetic, and thermodynamic properties were investigated. The magnetization and heat capacity data show the absence of long-range magnetic order at least down to 2 K. A positive Curie-Weiss temperature theta(w) similar to 45 K probed by the temperature dependence of magnetic susceptibility indicates that a Kitaev interaction is dominant. These observations suggest that a quantum spin liquid may have been realized. Furthermore, the observation of linear temperature-dependent contribution to the heat capacity with no magnetic field effect evidences gapless excitation. These facts are surprisingly contrary to the chemical disorder evidenced by the crystallographic analysis. By discussing the differences in the size effect of Z(2) fluxes in two-and three-dimensional Kitaev magnets, we propose that there is a hidden mechanism to protect the quantum spin liquid state from chemical disorder.
07 Feb. 2022, Research paper (scientific journal), joint, 6, 2, 2475-9953, DOI(公開)(r-map), L021401/1, L021401/6 - Formation of the Metastable Iron (III) Germanate Fe2GeO5 through Kinetic Control of the Oxidative Reaction
Kakimoto, Kazuo; Ohki, Yoshiaki; Takada, Saki; Haraguchi, Yuya; Yamamoto, Ayako; Katori, Hiroko Aruga
CHEMISTRY LETTERS
CHEMICAL SOC JAPAN
Synthesis of complex oxides requires high temperatures to overcome barriers due to the diffusion of solids. Therefore, the most stable polymorphs are obtained in general reactions. However, it is necessary to design kinetic reactions with low initial energy barriers and control the reaction path and products to synthesize novel and metastable oxides. We report the synthesis of a metastable Fe2GeO5 with a kyanite-type structure via kinetic control of oxidative reaction in Fe2GeO4. It is also found that Fe2GeO5 was not synthesized at all by the conventional method, high-pressure synthesis method, or coprecipitation method. Our result indicates that kinetic control of the oxidative reaction is a promising method for synthesizing metastable materials.
Apr. 2022, Research paper (scientific journal), joint, 51, 4, 0366-7022, DOI(公開)(r-map), 451, 454 - Improvement of the optical transmittance of a SiO2 surface by a femtosecond-laser-induced homogeneous nanostructure formation
Edakubo, Minami; Richter, Lukas Janos; Haraguchi, Yuyu; Aruga-katori, Hiroko; Ihlemann, Juergen; Miyaji, Godai
OPTICAL MATERIALS EXPRESS
Optica Publishing Group
It has been reported that periodic nanostructures with a period size of 200-330 nm can be formed on silicon suboxide (SiOx, x approximate to 1) with 800-nm, 100-fs laser pulses at a fluence much smaller than that needed for nanostructuring on glasses such as fused silica and borosilicate glass. We demonstrated that a homogeneous SiO2 nanostructure with a period of -240 nm can be produced using a two-step ablation process and heat treatment in air at 1000 degrees C for 144 hours. Optical microscopic images of the nanostructured surface illuminated by non-polarized visible light show that the transmittance increases as the reflectivity decreases.(c) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
01 Oct. 2022, Research paper (scientific journal), joint, 12, 10, 2159-3930, DOI(公開)(r-map), 3982, 3989 - Magnetic Properties of Eu(Co1-xNix)(2)P-2
Nakamura, Raito; Ohta, Hiroto; Kobayashi, Yoshio; Haraguchi, Yuya; Katori, Hiroko Aruga; Nakamura, Jin
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
PHYSICAL SOC JAPAN
Solid solution 122-type compounds, Eu(Co1-xNix)(2)P-2, were investigated using crystallographic, magnetic, and Eu-151 Mossbauer effect measurements. A discontinuous isostructural phase transition from the uncollapsed tetragonal (ucT) to collapsed tetragonal (cT) structure was observed around x = 0.3. In the ucT region, Eu was divalent and showed helical magnetism of the Eu sublattice as well as at x = 0. However, in the cT region, Eu had an intermediate valence (+2.2 at 300 K) and showed paramagnetic behavior. The temperature dependence of the Eu valence was in good agreement with the Inter-Configurational Fluctuation (ICF) model. The Eu sublattice lost its magnetic order, but the Co/Ni sublattice exhibited itinerant ferromagnetism around 150 K. In addition, the net magnetization was lost due to the antiferromagnetic-like reorientation of the Co/Ni spins below 70 K. This magnetic structure was not observed in other 122-compounds and was a novel magnetic phase.
15 Feb. 2022, Research paper (scientific journal), joint, 91, 2, 0031-9015, DOI(公開)(r-map), 024701/1, 024701/8 - Magnetism of AlxFe2-xGeO5 with Andalusite Structure
Kakimoto, Kazuo; Takada, Saki; Ohta, Hiroto; Haraguchi, Yuya; Hagihala, Masato; Torii, Shuki; Kamiyama, Takashi; Mitamura, Hiroyuki; Tokunaga, Masashi; Hatakeyama, Atsushi; Katori, Hiroko Aruga
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
PHYSICAL SOC JAPAN
The magnetism of AlxFe2-xGeO5 from x = 0.09 to 0.91 with the andalusite structure was examined. AlxFe2-xGeO5 at low temperatures was found to show a weak ferromagnet-like behavior for x 0.3 and a spin glass behavior for x 0.3. The small spontaneous magnetization observed in the weak ferromagnet-like samples may be caused by the existence of Dzyaloshinsky-Moriya interaction and the difference in the magnitudes of the magnetic moments of Fe3+ in the octahedral and trigonal bipyramidal sites. The appearance of the spin glass behavior implies that the dilution of Fe ions by Al ions in AlxFe2-xGeO5 causes the competition between ferromagnetic and antiferromagnetic interactions. The x dependence of the site occupancy of Fe ions suggests that Fe2GeO5 with the andalusite structure cannot be synthesized.
15 May 2022, Research paper (scientific journal), joint, 91, 5, 0031-9015, DOI(公開)(r-map), 054704/1, 054704/7 - Sinusoidal Magnetic Structure of Andalusite-type AlxFe2-xGeO5 with x=0.09 and 0.15
Kakimoto, Kazuo; Ohta, Hiroto; Haraguchi, Yuya; Hagihala, Masato; Torii, Shuki; Kamiyama, Takashi; Katori, Hiroko Aruga
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
PHYSICAL SOC JAPAN
Neutron diffraction experiments on polycrystalline andalusite-type AlxFe2-xGeO5 with x = 0.09 and 0.15 were performed. The magnetic Bragg peaks with the propagation vectors of kx=0.09 = (0, 0.150(1), 0) for the sample with x = 0.09 and kx=0.15 = (0, 0.141(1), 0) for the sample with x = 0.15 were observed, which means that an incommensurate magnetic order was realized for each sample. The calculation of the magnetic structure factors by the Pawley method and the analysis of the irreducible representations revealed that both samples have a magnetic structure in which the magnetic moments rotate in the crystallographic ab-plane with sinusoidal modulation along the b-axis. By the Luttinger-Tisza method, we determined the sign of the nearest-neighbor exchange interaction constants that reproduce the magnetic structures obtained by the irreducible representation analysis.
15 May 2022, Research paper (scientific journal), joint, 91, 5, 0031-9015, DOI(公開)(r-map), 054707/1, 054707/9 - Metallic state in the vicinity of molecular orbital crystallization in the d (1) thiospinel ZnTi2S4 prepared via a reductive ion-exchange reaction
Haraguchi, Yuya; Arikai, Hiroki; Katori, Hiroko Aruga
JOURNAL OF PHYSICS-CONDENSED MATTER
IOP PUBLISHING LTD
A novel Ti3+-based thiospinel ZnTi2S4 is successfully synthesized via a low-temperature ion-exchange reaction. ZnTi2S4 shows a signature of metallic ground state evidenced by a contribution of conduction electrons in the heat capacity and Pauli-like paramagnetic susceptibility. These observations contrast to the electronic state of similar Ti3+-based spinel MgTi2O4 exhibiting the metal-insulator transition associated with a molecular orbital crystallization (MOC). Furthermore, the magnetic susceptibility of ZnTi2S4 shows a pseudogap-like behavior indicated by a vast peak in the magnetic susceptibility around 110 K, likely originating from the MOC fluctuation. The origin of the difference in the electronic states of MgTi2O4 and ZnTi2S4 would be due to the different magnitude of overlap between Ti 3d and p orbitals (O: 2p and S: 3p). The presence of a MOC state in the close vicinity of insulator-metal transition may suggest the importance of itinerancy in a MOC.
27 Jul. 2021, Research paper (scientific journal), joint, 33, 39, 0953-8984, DOI(公開)(r-map), 395603/1, 395603/5 - 4d(3) Ru5+ triangular lattice antiferromagnets: Layered rock-salt beta-Li3Mg2RuO6 and ion-exchanged delafossite Ag3Mg2RuO6
Haraguchi, Yuya; Kakimoto, Kazuo; Aruga Katori, Hiroko
JOURNAL OF SOLID STATE CHEMISTRY
ACADEMIC PRESS INC ELSEVIER SCIENCE
The crystal structure and magnetic properties of Ru5+ triangular lattice antiferromagnets beta-Li3Mg2RuO6 and Ag3Mg2RuO6 are reported. We successfully synthesized a pseudohexagonal layered rock-salt type phase beta-Li3Mg2RuO6 with 2:1 ordering of Mg and Ru, which is a polymorph of an orthorhombic partial ordered rock-salt phase alpha-Li3Mg2RuO6. Shortening a calcinating time and adding excessive amounts of Li can prevent a polymorphic transformation from beta-Li3Mg2RuO6 to alpha-Li3Mg2RuO6. An ordered delafossite compound Ag3Mg2RuO6 has been obtained by topochemical molten salt ionic exchange reaction to beta-Li3Mg2RuO6. In beta-Li3Mg2RuO6 and Ag3Mg2RuO6, multiple superexchange pathways Ru5+-O2--O2--Ru5+ leads to large antiferromagnetic interactions of theta(W) = -113.9 and -108.1 K, respectively, despite a long distance between the magnetic Ru5+ ions. In addition, beta-Li3Mg2RuO6 and Ag3Mg2RuO6 exhibit antiferromagnetic orderings with a trace of spin glasslike contribution at T-N = 13 and 24 K, respectively, which is evidenced by the heat capacity measurement. While beta-Li3Mg2RuO6 exhibits a magnetic behavior that follows the Curie-Weiss curve up to just above T-N, Ag3Mg2RuO6 exhibits a magnetic behavior that deviates from the Curie-Weiss curve below 100 K, which is considerably higher than T-N. The different magnetic behaviors suggest a difference in magnetic dimensionality, indicating that the difference in the coordination environment around interlayer between Li+ and Ag+ ions gives rise to considerably different interlayer superexchange pathways in both systems.
Jul. 2021, Research paper (scientific journal), joint, 299, 0022-4596, DOI(公開)(r-map), 122171/1, 122171/6 - Strong antiferromagnetic interaction owing to a large trigonal distortion in the spin-orbit-coupled honeycomb lattice iridate CdIrO3
Y. Haraguchi, and H. Aruga Katori
Physical Review Materials
03 Apr. 2020, Research paper (scientific journal), joint, 4, 4, DOI(公開)(r-map), 044401/1, 044401/5 - Magnetocaloric Study of Ln2Co12P7(Ln=T, Nd, and Sm)
H. Ohta, Y. Kato, Y. Watanabe, H. Aruga Katori, N. Tsujii, N. Kikugawa, and H, Sakurai
J.Jpn.Soc. Powder Powder Metallurgy
15 Feb. 2020, Research paper (scientific journal), joint, 67, 2, DOI(公開)(r-map), 97, 99 - Study on Magnetism and Electronic Structure of New Layered Compound Sr3Sc2O5Co2As2 with Body-Centered Crystal Structure
Ohta, Hiroto; Suzuki, Atsushi; Katori, Hiroko Aruga
Journal of the Physical Society of Japan
We synthesized a polycrystalline sample of a new compound, Sr3Sc2O5Co2As2, and measured its magnetization and electric resistivity. The measurement results showed that Sr3Sc2O5Co2As2 is the first example of a weak itinerant electronic ferromagnet among the compounds with CoAs layers, whose crystal structure belongs to the space group I4/mmm and which have divalent Co ions. By performing electronic structure calculations, we demonstrated the realization of the ferromagnetic ground state in Sr3Sc2O5Co2As2 and also showed the similarity of its electronic structure to those of ferromagnets with CoAs layers. Our results clarified that compounds with CoAs layers can be universally understood in terms of itinerant ferromagnetism. Our findings will also shed light on the mystery of why AeCo(2)Pn(2) (Ae = Sr, Ba, Pn = P, As) and Sr2CrO2Co2As2 do not exhibit ferromagnetism even though they seem to have the potential to do so.
15 May 2019, Research paper (scientific journal), joint, 88, 5, 0031-9015, DOI(公開)(r-map) - Magnetic Study on Y2M3Co9P7 (M: Transition Metals) with Cation-Ordered Zr2Fe12P7-Type Structure
Y. Kato, H. Ohta, and H. Aruga Katori
Solid State Phenomena
08 Apr. 2019, Research paper (scientific journal), joint, 289, DOI(公開)(r-map), 164, 169 - Disappearance of the Itinerant Electronic Ferromagnetism in Layered Compound Sr2VO3CoAs due to Self-Electron-Doping Effect
Ohta, Hiroto; Noguchi, Daisuke; Katori, Hiroko Aruga
Journal of the Physical Society of Japan
We successfully synthesized a polycrystalline sample of Sr2VO3CoAs, a new member of the group of compounds with CoAs layers. Physical property measurement results show that the magnetic moments of Co do not show itinerant electronic ferromagnetism, unlike other compounds with CoAs layers, whereas the magnetic moments of V show antiferromagnetic ordering below 140 K separately from the magnetic moments of Co. By partially substituting Fe for Co in Sr2VO3CoAs we successfully induced the itinerant electronic ferromagnetism of magnetic moments of Co with T-C similar to 50K. These results show that the electronic state of CoAs layers of Sr2VO3CoAs is naturally in an ”overdoped” state, although that of other members with CoAs layers is in the optimally doped state for the itinerant electronic ferromagnetism. Sr2VO3CoAs is overdoped because of the self-electron doping from V to the 3d band of Co, as observed in the Fe analogue.
15 Sep. 2018, Research paper (scientific journal), joint, 87, 9, 0031-9015, DOI(公開)(r-map) - Study of Magnetism and Electronic Structures of Compounds with CoAs Layers
H. Ohta, A. Suzuki, D. Noguchi, A. Oda, T. Iinuma, and H. Aruga Katori
J.Jpn.Soc. Powder Powder Metallurgy
May 2018, Research paper (scientific journal), joint, 65, 5, DOI(公開)(r-map), 261, 264 - Magnetism and Electronic States of X2Co12P7(X=Ti, Zr and Hf)
188. Y. Kato, H. Ohta, and H. Aruga Katori
J.Jpn.Soc. Powder Powder Metallurgy
May 2018, Research paper (scientific journal), joint, 65, 5, DOI(公開)(r-map), 274, 278 - Study of itinerant electronic ferromagnetism in layered compounds Ae2ScO3CoPn (Ae = Sr, Ba, Pn =P, As)
H. Ohta, S. Ido, S. Hashizume, and H. Aruga Katori
J. Phy.: Conf. Ser.
Jul. 2017, Research paper (scientific journal), joint, 868, DOI(公開)(r-map), 012010/1, 012010/7 - Anomalous antiferromagnetic state in Nd2Co12P7
Y. Watanabe, H. Ohta, H. Aruga Katori, A. Miyake and M. Tokunaga
J. Phy.: Conf. Ser.
Jul. 2017, Research paper (scientific journal), joint, 868, DOI(公開)(r-map), 012020/1, 012020/6 - Synthesis and study of electronic state of Sr2CrO2Co2As2 with CoAs conduction layers
A. Suzuki, H. Ohta, and H. Aruga Katori
J. Phy.: Conf. Ser.
Jul. 2017, Research paper (scientific journal), joint, 868, DOI(公開)(r-map), 012024/1, 012024/7 - Anomalous Behavior of Localized Magnetic Moments in Itinerant Ferromagnets Ln2Co12P7 (Ln=Y, Pr, Nd, Sm, Gd and Dy)
Hiroto Ohta, Yusuke Watanabe, Atsushi Miyake, Masashi Tokunaga, and Hiroko Aruga Katori
J.Jpn.Soc. Powder Powder Metallurgy
Jul. 2016, Research paper (scientific journal), joint, 63, 7, 652, 656 - Electron doping effect on AeCo2As2(Ae=Ca, Sr and Ba)
Hiroto Ohta, Eisuke Akabane, and Hiroko Aruga Katori
Physical Procedia
Dec. 2015, Research paper (scientific journal), joint, 75, 309, 313 - Magnetism in Two-Leg ladder Compound Ba6Fe8O15 with Mixed Oxidation State of Iron
Hiroko Aruga Katori, Takahiro Adachi,Hiroto Ohta, Shin Nakamura,and Akio Fuwa
Physical Procedia
Dec. 2015, Research paper (scientific journal), joint, 75, 552, 556 - Commensurate structural modulation in the charge- and orbitally ordered phase of the quadruple perovskite (NaMn3)Mn4O12
A. Prodi, A. Daoud-Aladine, F. Gozzo, B. Schmitt, O. Lebedev, G. van Tendeloo, E. Gilioli, F. Bolzoni, H. Aruga Katori, H. Takagi, M. Marezio, and A. Gauzzi
Phys. Rev. B
Nov. 2014, Research paper (scientific journal), joint, 90, 18, 180101(R)/1, 5 - Small ordered magnetic moment in a weak itinerant electron ferromagnet Sc3In
K. Kamishima, R. Note, T. Imakubo, K. Watanabe, H. Aruga Katori, A. Fujimori, M. Sakai, K.V. Kamenev
Journal of Alloys and Compounds
Jan. 2014, Research paper (scientific journal), joint, 589, 37, 41 - Itinerant electronic ferromagnetism in Sr2ScO3CoAs with largely spaced CoAs conduction layers
Hiroto Ohta, Daisuke Noguchi, Koichiro Nabetani, and Hiroko Aruga Katori
Phys. Rev. B
Sep. 2013, Research paper (scientific journal), joint, 88, 9, 094441/1, 6 - Magnetic Field-Induced Phase Transitions in the S=1/2 Two-Leg Spin-Ladder Material Cu(DEP)Br2
Z. Honda, H. Aruga Katori, M. Ikeda, M. Hagiwara, K. Okunishi, M. Sakai, T. Fukuda, and N. Kamata
J. Phys. Soc. Jpn
Nov. 2012, Research paper (scientific journal), joint, 81, 11, 113710/1, 4 - Magnetic-Field-Induced Transitions in Spinel GeCo2O4
M. Matsuda, T. Hoshi, H. Aruga Katori, M. Kosaka and H. Takagi
J. Phys. Soc. Jpn.
Mar. 2011, Research paper (scientific journal), joint, 80, 3, 034708/1, 5 - Phase transition of a triangular lattice Ising antiferromagnet FeI2
K. Katsumata, H. Aruga Katori, S. Kimura, Y. Narumi, M. Hagiwara, and K. Kindo
Phys. Rev. B
Oct. 2010, Research paper (scientific journal), joint, 82, 104402/1, 10 - Isothermal remanent magnetization and the spin dimensionality of spin glasses
R. Mathieu, M. Hudl, P. Nordblad, Y. Tokunaga, Y. Kaneko, Y. Tokura, H. Aruga Katori and A. Ito
Philos. Mag. Lett.
Sep. 2010, Research paper (scientific journal), joint, 90, 723, 729 - Ten Layered Hexagonal Perovskite Sr5Ru5−xO15 (x=0.90), a Weak Ferromagnet with a Giant Coercive Field Hc~12 T
A. Yamamoto, D. Hashizume, H. Aruga Katori, T. Sasaki, E. Ohmichi, T. Nishizaki, N. Kobayashi, and H. Takagi
Chem. Mater. 22
Sep. 2010, Research paper (scientific journal), joint, 22, 5712–5717 - Bose-glass state in one-dimensional random antiferromagnets
H. Manaka, H. Aruga Katori, O.V. Kolomiets and T. Goto
Phys. Rev. B
Sep. 2009, Research paper (scientific journal), joint, 79, 9, 092401/1, 4
Presentations
- Frustrated magnetism in alkaline-intercalated Mo3O8-type compounds
29th International Conference on Low Temperature Physics
Aug. 2022, Poster presentation - Kitaev spin liquid signature in the hyperhoneycomb iridate
29th International Conference on Low Temperature Physics
Aug. 2022, Poster presentation - From rocksalt to ilmenite: a metathesis route for the synthesis of novel quantum materials
The 2021 International Chemical Congress of Pacific Basin Societies
16 Dec. 2021, Oral presentation(general) - 高スピンd7電子系Kitaev-Heisenberg模型カゴメ格子反強磁性体BaCo3(XO4)2(OH)2 (X = V, As)の合成と磁性
日本物理学会2021年秋季大会
Sep. 2021, Oral presentation(general) - 遍歴磁性体(Ca1-xMgx)2Co12P7の単結晶を用いた磁性研究II
日本物理学会第75回年次大会
16 Mar. 2020, Poster presentation - Magnetic Properties of Kyanites M2GeO5(M=Cr and V)
International Symposium of Thermal and Entropic Science
12 Mar. 2020, Oral presentation(invited, special) - 低温複分解反応を用いた新規キタエフ候補物質の探索
日本物理学会2019年秋季大会
11 Sep. 2019, Poster presentation - 遍歴磁性体 (Ca1-xMgx)2Co12P7 の単結晶を用いた磁性研究
日本物理学会2019年秋季大会
10 Sep. 2019, Poster presentation - 遍歴電子強磁性体 Y2Co12P7 の電子状態と磁性の研究
日本物理学会2019年秋季大会
10 Sep. 2019, Poster presentation - 遍歴電子強磁性体 X2Co12P7 (X = Zr, Hf) のFe置換効果と磁性の研究
日本物理学会2019年秋季大会
10 Sep. 2019, Poster presentation - EuCo2P2のNi置換による磁性の研究
日本物理学会2019年秋季大会
10 Sep. 2019, Poster presentation - 磁気モーメントを持つ Sillimanite 相 M2GeO5 の探索
日本物理学会第74回年次大会
14 Mar. 2019, Poster presentation - 遍歴電子強磁性体 Y2(FexCo1-x)12P7 の 57Fe メスバウアー分光による磁気秩序状態の研究
日本物理学会第74回年次大会
14 Mar. 2019, Poster presentation - 鉄梯子化合物 Ba6Fe8S15 の磁気秩序状態における電子状態の研究
日本物理学会2018年秋季大会
10 Sep. 2018, Poster presentation - 多形化合物 Fe2-xAlxGeO5 のメスバウアー分光を用いた構造と磁性の研究
日本物理学会2018年秋季大会
09 Sep. 2018, Poster presentation - 遍歴電子強磁性体 Y2(Fe,Co)12P7 のメスバウアー分光による構造と磁性の研究
日本物理学会2018年秋季大会
09 Sep. 2018, Poster presentation - Magnetic Study on Y2M3Co9P7 (M: Transition Metals) with Cations Ordered Zr2Fe12P7-type Structure
The 21st International Conference on Solid Compounds of Transition Elements (SCTE 2018)
Mar. 2018, Poster presentation - Magnetic Properties of Kyanites M2GeO5 (M=Cr and V)
The 21st International Conference on Solid Compounds of Transition Elements (SCTE 2018)
Mar. 2018, Poster presentation - Andalusite 構造を持つ GaxFe2-xGeO5 における磁性の研究
日本物理学会第73回年次大会
22 Mar. 2018, Poster presentation - 逆スピネル化合物 Mn2-xZnxXO4 (X = Sn, Ti) の構造と磁性の研究
日本物理学会第73回年次大会
22 Mar. 2018, Poster presentation - 遍歴強磁性体 Ln2Co12As7 (Ln:lanthanoid) の構造と磁性
日本物理学会第73回年次大会
22 Mar. 2018, Poster presentation - TxM2-xGeO5 (T = Al, Ga, M = V, Cr, Fe) における相図と磁性の研究
日本物理学会第73回年次大会
22 Mar. 2018, Poster presentation - 逆スピネル Co2XO4 (X = Ti, Sn) における Co の非磁性元素部分置換による磁性の研究
日本物理学会第73回年次大会
22 Mar. 2018, Poster presentation - Study on Effects of Site-selective Substitution in Itinerant Ferromagnets
2nd International Symposium on Negative Thermal Expansion and Related Materials (ISNTE-II)
Dec. 2017, Poster presentation - Crystal Structure and Magnetic Property of Polymorphs (AlxFe2-x)GeO5
2nd International Symposium on Negative Thermal Expansion and Related Materials (ISNTE-II)
Dec. 2017, Oral presentation(invited, special) - Phase Diagram and Magnetism of (AlxFe2-x)GeO5 - Polymorph
The 6th Toyota RIKEN International Workshop "New Trends in Solid State Chemistry: from Oxides to Mixed Anion Compounds"
Nov. 2017, Poster presentation - Magnetism and Electronic States of X2Co12P7 (X = Ti, Zr and Hf)
International Conference on Powder and Powder Metallurgy ~60th Anniversary~
Nov. 2017, Poster presentation - Study of magnetism and electronic structures of compounds with CoAs layers
International Conference on Powder and Powder Metallurgy ~60th Anniversary~
Nov. 2017, Poster presentation - 逆スピネル化合物 Co2XO4 (X = Ti, Sn) の Mg 部分置換による研究
日本物理学会2017年秋季大会
21 Sep. 2017, Poster presentation - 多形(AlxFe2-x)GeO5 における状態図と磁性の研究
日本物理学会2017年秋季大会
21 Sep. 2017, Poster presentation - 遍歴強磁性体 A2Co12P7 (A = Ca, Y, Zr) の選択的元素置換効果
日本物理学会2017年秋季大会
21 Sep. 2017, Poster presentation - GexFe3-xO4 (0≦x≦1) の保磁力に対する磁気凍結の影響の研究
日本物理学会第72回年次大会
18 Mar. 2017, Oral presentation(general) - 遍歴電子強磁性体 Ln2Co12P7 (Ln = lanthanoid) の磁性および Ln-Co 間相互作用の研究
日本物理学会第72回年次大会
18 Mar. 2017, Oral presentation(general) - 単結晶を用いた逆スピネル Co2XO4 (X = Ti, Sn) の Zn 部分置換系の磁気的研究
日本物理学会第72回年次大会
17 Mar. 2017, Poster presentation - CoAs 層を有する層状化合物の局所的構造と磁性の関係の研究
日本物理学会第72回年次大会
17 Mar. 2017, Poster presentation - Andalusite 構造を持つ (AlxFe2-x)GeO5 における磁性の研究
日本物理学会第72回年次大会
17 Mar. 2017, Poster presentation - 特異なフェリ磁性を示す逆スピネル化合物 Co2XO4 (X = Sn, Ti) の Zn 部分置換による研究
日本物理学会2016年秋季大会
13 Sep. 2016, Poster presentation - Kyanite構造を持つM2GeO5(M=Cr, V)における磁性の研究
日本物理学会2016年秋季大会
13 Sep. 2016, Poster presentation - Y2Co12P7におけるCoの選択的部分置換による強磁性の強化
日本物理学会2016年秋季大会
13 Sep. 2016, Poster presentation - 層状遍歴電子磁性体 Ae4Sc3O7.5Co2Pn2 (Ae = Sr, Ba, Pn = P, As)の探索と磁性
日本物理学会2016年秋季大会
13 Sep. 2016, Poster presentation - 単結晶GexFe3-xO4(0≦x≦1)におけるスピングラスと保磁力の関係の研究
日本物理学会2016年秋季大会
13 Sep. 2016, Poster presentation - 鉄梯子格子化合物 Ba6Fe8S15 の構造と磁気秩序
日本物理学会第71回年次大会
19 Mar. 2016, Poster presentation - CoAs層を含む新規層状化合物 Sr3Sc2O5Co2As2 の磁性
日本物理学会第71回年次大会
19 Mar. 2016, Other - スピネル化合物の単結晶を用いた保磁力とフラストレーションの研究
日本物理学会第71回年次大会
19 Mar. 2016, Poster presentation - Anomalous behavior of localized magnetic moments in itinerant ferromagnets Ln2Co12P7 (Ln: Lanthanoid)
3rd International Conference on Powder Metallurgy in Asia
09 Nov. 2015, Poster presentation - Anomalous antiferromagnetic state in Nd2Co12P7
International Workshop on Itinerant-Electron Magnetism
26 Sep. 2015, Poster presentation - Synthesis and study of electronic state of Sr2CrO2Co2As2 with CoAs conduction layers
International Workshop on Itinerant-Electron Magnetism
26 Sep. 2015, Poster presentation - Study of itinerant electronic ferromagnetism in layered compounds Ae2ScO3CoPn (Ae = Sr, Ba, Pn = P, As)
International Workshop on Itinerant-Electron Magnetism
26 Sep. 2015, Poster presentation - マグネタイトおよび関連物質における保磁力の非磁性元素置換効果
日本物理学会2015年秋季大会
16 Sep. 2015, Poster presentation - 層状化合物 Ae2ScO3CoPn (Ae = Sr, Ba, Pn = P, As) における遍歴電子強磁性の研究
日本物理学会2015年秋季大会
16 Sep. 2015, Poster presentation - MAs層を含む化合物 Sr2CrO2M2As2 (M：遷移金属)のキャリアドープと磁性
日本物理学会2015年秋季大会
16 Sep. 2015, Poster presentation - Electron doping effect on AeCo2As2 (Ae=Ca, Sr and Ba)
20th International Conference on Magnetism
07 Jul. 2015, Poster presentation - Anomalous oxidation state of iron in two-leg ladder compound Ba6Fe8S15
20th International Conference on Magnetism
07 Jul. 2015, Poster presentation - 強磁性体 Ln2Co12P7 (Ln:ランタノイド) における自発磁化の特異な温度依存性の研究
日本物理学会第70回年次大会
21 Mar. 2015, Poster presentation - 逆スピネル化合物 M2SnO4 および関連物質の磁性
日本物理学会第70回年次大会
21 Mar. 2015, Poster presentation - Fe梯子格子を含む化合物Ba6Fe8S15の反強磁性状態におけるFeの特異な価数とサイト占有数の研究
日本物理学会第70回年次大会
21 Mar. 2015, Oral presentation(general) - Fe 梯子格子を含む化合物 Ba6Fe8S15 の低次元磁性
日本物理学会2014年秋季大会
08 Sep. 2014, Oral presentation(general) - 遷移金属ニクタイド層を含む Sr2Mn3As2O2 型化合物における新規磁性体の探索
日本物理学会2014年秋季大会
07 Sep. 2014, Poster presentation - 遍歴電子磁性体 AeCo2As2 (Ae = Ca,Sr,Ba) の低次元性と磁性
日本物理学会2014年秋季大会
07 Sep. 2014, Poster presentation - 三元系化合物 LnCo12P7(Ln: ランタノイド)の強磁性-反強磁性転移
日本物理学会2014年秋季大会
07 Sep. 2014, Poster presentation - 層状化合物 Sr2VO3CoAs の電子状態と磁性
日本物理学会第69回年次大会
29 Mar. 2014, Oral presentation(general) - 遍歴電子磁性体 AeCo2As2 の構造と磁性
日本物理学会第69回年次大会
29 Mar. 2014, Oral presentation(general) - 擬一次元スクリューチェーン化合物 PbCo2-xMnxV2O8 の合成および磁性
日本物理学会第69回年次大会
27 Mar. 2014, Oral presentation(general) - スピネル化合物 Mn2SnO4 の合成と磁性
日本物理学会第69回年次大会
27 Mar. 2014, Oral presentation(general) - スピネル化合物GeFe2O4単結晶の磁気異方性
日本物理学会2013年秋季大会
27 Sep. 2013, Oral presentation(general) - 三元系化合物Ln2Co12Pn7の磁性と電気伝導性
日本物理学会2013年秋季大会
26 Sep. 2013, Poster presentation - 層状化合物AeCo2As2へのキャリアドープと磁性
日本物理学会2013年秋季大会
25 Sep. 2013, Oral presentation(general) - CoAs層を持つ遍歴電子磁性体Sr2ScO3CoAsのＶ置換効果と物性
日本物理学会2013年秋季大会
25 Sep. 2013, Oral presentation(general) - CoAs層を有する遍歴電子強磁性体の元素置換効果
日本物理学会第68回年次大会
29 Mar. 2013, Poster presentation - スピネル化合物 GeFe2O4 単結晶の磁場中の物性
日本物理学会第68回年次大会
29 Mar. 2013, Oral presentation(general) - 二次元遍歴電子磁性体Ae2MO3CoAsの磁性
日本物理学会第68回年次大会
28 Mar. 2013, Oral presentation(general) - 遍歴強磁性体Sr2ScO3CoAsの磁性
日本物理学会2012年秋季大会
20 Sep. 2012, Oral presentation(general) - スピネル化合物GeFe2O4単結晶の非線形帯磁率測定
日本物理学会2012年秋季大会
18 Sep. 2012, Oral presentation(general) - スピネル化合物GeFe2O4単結晶の合成と磁性
日本物理学会2012年秋季大会
18 Sep. 2012, Oral presentation(general) - CoAs層を有する遍歴電子磁性体 Ae2MO3CoAs の物性
日本物理学会2012年秋季大会
18 Sep. 2012, Oral presentation(general) - コバルトニクタイド系における新物質の探索
日本物理学会第67回年次大会
25 Mar. 2012, Oral presentation(general) - スピネル化合物 GeM2O4(M=Co, Fe) における磁場誘起相転移
特定領域研究「フラストレーションが創る新しい物性」最終成果報告会
07 Jan. 2012, Oral presentation(invited, special) - Field-Induced Phase Transitions in Frustrated Systems
21st IUPAC International Conference on Chemical Thermodynamics
02 Aug. 2010, Oral presentation(invited, special)