Naoki Ishimatsu
Last Updated :2024/04/03
- Affiliations, Positions
- Graduate School of Advanced Science and Engineering, Associate Professor (Special Recognition)
- E-mail
- ishimatsunaokihiroshima-u.ac.jp
- Other Contact Details
- "HIGASHI-HIROSHIMA, KAGAMIYAMA, 1-3-1", Japan
TEL : (+81)824-24-7386 FAX : (+81)824-24-0717
- Self-introduction
- I am a high-pressure researcher using X-ray absorption spectroscopy
Basic Information
Major Professional Backgrounds
- 2001/10/01, 2007/03/31, Hiroshima University, Graduate School of Science, Research Associate
- 2007/04/01, 2020/03/31, Hiroshima University, Graduate School of Science, Assistant Professor
- 2020/04/01, Hiroshima University, Graduate School of Advanced Science and Engineering, Assistant Professor
- 2023/04/23, Hiroshima University, Associate Professor (Special Recognition)
Educational Backgrounds
- Tokyo Institute of Technology, Japan, 1996/04, 1999/03
- Toyama University, Japan, 1994/04, 1996/03
- Toyama University, Japan, 1990/04, 1994/03
Academic Degrees
- Doctor of Science, Tokyo Institute of Technology
- Master of Science, Toyama University
Educational Activity
- [Bachelor Degree Program] School of Science : Physics : Physics
- [Master's Program] Graduate School of Advanced Science and Engineering : Division of Advanced Science and Engineering : Physics Program
- [Doctoral Program] Graduate School of Advanced Science and Engineering : Division of Advanced Science and Engineering : Physics Program
In Charge of Primary Major Programs
Research Fields
- Engineering;Material engineering;Structural / Functional materials
Research Keywords
- high pressure
- X-ray absorption spectroscopy
- synchrotron radiation
Affiliated Academic Societies
- The Japanese Society for Synchrotron Radiation Research
- The Physical Society of Japan(JPS)
- The Japan Society of High Pressure Science and Technology
- The Iron and Steel Institute of Japan
Educational Activity
Course in Charge
- 2024, Undergraduate Education, 4Term, Advanced Physics
- 2024, Undergraduate Education, First Semester, Laboratory in PhysicsI
- 2024, Undergraduate Education, Second Semester, Laboratory in PhysicsII
- 2024, Undergraduate Education, 2Term, Special Lectures in Physics(Practical Data Analysis B (Condensed Matter Physics))
- 2024, Graduate Education (Master's Program) , 1Term, Special Topics in Synchrotron Radiation Science A
- 2024, Graduate Education (Master's Program) , First Semester, Exercise in Physics I
- 2024, Graduate Education (Master's Program) , Second Semester, Exercise in Physics II
- 2024, Graduate Education (Master's Program) , First Semester, Special Exsecise in Physics A
- 2024, Graduate Education (Master's Program) , Second Semester, Special Exsecise in Physics B
- 2024, Graduate Education (Master's Program) , Academic Year, Special Research in Physics
Research Activities
Academic Papers
- Ferrimagnetic coupling between cobalt and light rare-earth samarium induced by dense hydrogenation of SmCo5 permanent magnet under high pressures, PHYSICAL REVIEW MATERIALS, 7(2), 20230203
- Visualization of the disordered structure of Fe-Ni Invar alloys by reverse monte carlo calculations, FRONTIERS IN MATERIALS, 9, 20220902
- Impacts of pressure to the structural, electronic and magnetic properties of Dirac semimetal EuMnBi2, PHYSICAL REVIEW RESEARCH, 3(4), 20211011
- Elongation of Fe-Fe atomic pairs in the Invar alloy Fe65Ni35, PHYSICAL REVIEW B, 103(22), 20210615
- Strong variant selection observed in the alpha-epsilon martensitic transition of iron under quasihydrostatic compression along [111](alpha), PHYSICAL REVIEW B, 102(5), 20200825
- Melting Curve and Phase Relations of Fe-Ni Alloys: Implications for the Earth's Core Composition, GEOPHYSICAL RESEARCH LETTERS, 47(14), 20200728
- Conical support for double-stage diamond anvil apparatus, HIGH PRESSURE RESEARCH, 40(1), 12-21, 20200102
- Element-selective elastic properties of Fe65Ni35 Invar alloy and Fe72Pt28 alloy studied by extended X-ray absorption fine structure, HIGH PRESSURE RESEARCH, 40(1), 130-139, 20200102
- An application of NPD to double-stage diamond anvil cells: XAS spectra of rhenium metal under high pressures above 300 GPa, HIGH PRESSURE RESEARCH, 40(1), 119-129, 20200102
- Pressure-Induced Collapse of the Guest Eu Off-Centering in Type-I Clathrate Eu8Ga16Ge30, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 88(11), 20191115
- Temperature and pressure dependences of Sm valence in intermediate valence compound SmB6, PHYSICA B-CONDENSED MATTER, 536, 197-199, 20180501
- Pressure and magnetic field effects on the valence transition of EuRh2Si2, PHYSICA B-CONDENSED MATTER, 536, 427-431, 20180501
- Kondo-like behavior near the magnetic instability in SmB6: Temperature and pressure dependences of the Sm valence, PHYSICAL REVIEW B, 97(16), 20180430
- Emergence of a new valence-ordered structure and collapse of the magnetic order under high pressure in EuPtP, JOURNAL OF PHYSICS-CONDENSED MATTER, 30(10), 20180314
- Effect of Fe-site Substitution on Pressure-induced Spin Transition in SrFeO2, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 86(12), 20171215
- Isotropic shrinkage of the oxygen octahedron in SrTiO3 under uniaxial pressure, JOURNAL OF PHYSICS-CONDENSED MATTER, 29(39), 20171004
- Relationship between element-selective electronic states and hydrogen absorption properties of Pd-M (M = Ru, Rh, Ag, and Au) alloys, PHYSICAL REVIEW B, 95(2), 20170130
- High-Pressure-Hydrogen-Induced Spin Reconfiguration in GdFe2 Observed by Fe-57-Polarized Synchrotron Radiation Mossbauer Spectroscopy with Nuclear Bragg Monochromator, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 85(12), 20161215
- Pressure-Driven Spin Crossover Involving Polyhedral Transformation in Layered Perovskite Cobalt Oxyfluoride, SCIENTIFIC REPORTS, 6, 20161102
- Two-Step Suppression of Charge Disproportionation in CaCu3Fe4O12 under High Pressure, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 85(3), 20160315
- Differences in local structure around Co and Fe of the BiCo1-xFexO3 system determined by x-ray absorption fine structure, PHYSICAL REVIEW B, 92(5), 20150821
- Pressure-Induced Valence Crossover and Novel Metamagnetic Behavior near the Antiferromagnetic Quantum Phase Transition of YbNi3Ga9, PHYSICAL REVIEW LETTERS, 114(8), 20150224
- alpha-epsilon transition pathway of iron under quasihydrostatic pressure conditions, PHYSICAL REVIEW B, 90(1), 20140717
- 064206Structural, magnetic and electronic state characterization of L1(0)-type ordered FeNi alloy extracted from a natural meteorite, JOURNAL OF PHYSICS-CONDENSED MATTER, 26(6), 20140212
- Hydrogen-induced modification of the electronic structure and magnetic states in Fe, Co, and Ni monohydrides, PHYSICAL REVIEW B, 86(10), 20120924
- Pressure-induced changes in the magnetic and valence state of EuFe2As2, PHYSICAL REVIEW B, 84(2), 20110705
- Paramagnetism with anomalously large magnetic susceptibility in beta(fcc)-cobalt probed by x-ray magnetic circular dichroism up to 170 GPa, PHYSICAL REVIEW B, 83(18), 20110509
- Pressure-Induced Spin-State Transition in BiCoO3, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 132(27), 9438-9443, 20100714
- Effect of hydrogenation on the electronic state ofmetallic La hydrides probed by X-ray absorption spectroscopy at the La L-edges, Journal of Physics: Conference Series, 012070, 20091101
- Orbital contribution to perpendicular magnetic anisotropy in Co80Pt20 thin films, JOURNAL OF APPLIED PHYSICS, 106(3), 20090801
- 21aYG-5 Ga K-edge XMCD in Mn_3GaC at low temperature under high pressure, Meeting abstracts of the Physical Society of Japan, 63(2), 20080825
- Application of photoelectron emission microscopy (PEEM) to extraterrestrial materials, SURFACE SCIENCE, 601(20), 4764-4767, 20071015
- Easy-axis rotation in meteoritic iron probed by photoelectron emission microscope (PEEM), SURFACE SCIENCE, 601(18), 4326-4328, 20070915
- The Valence state of Yb ion in YbInAu2 Compound at High Pressure determined by x-ray diffraction and x-ray Absorption near edge structure measurements, Journal of Applied Physics, 100, 043712 1-4, 20061001
- Maicrostructure analysis using a photoelectron emission microscope (PEEM) with hard x-ray, e-Journal of Surface Science and Nanotechnology, 4, 490-493, 20060703
- XMCD study of magnetic phase transition in Mn3ZnC perovskite, PHYSICA B-CONDENSED MATTER, 351(3-4), 328-332, 20040915
- The Valence state of Yb metal unser high pressure determined by XANES measurement up to 34.6 GPa, J. Alloys and Compounds, 375, 34-37, 20040401
- XMCD study of magnetic transition in Mn3ZnC perovskite, Physica B, 351, 328-332, 20040401
- Mg/Si ratios of aqueous fluids coexisting with forsterite and enstatite based on the phase relation in the Mg2SiO4-SiO2-H2O system, American Mineralogist, 89, 1433-1437, 20040401
- Pressure-Induced Magnetic Transition in Fe4N Probed by Fe K-edge XMCD Measurement, J. Phys. Sci. Jpn., 72, 2372-2376, 20030901
- X-ray magnetic circular dichroism study of metamagnetic behaviour in the heavy-fermion system CeRu2Si2, JOURNAL OF PHYSICS-CONDENSED MATTER, 15(28), S2171-S2174, 20030723
- X-ray Magnetic Circular Dichroism Study of Metamagnetic Behaviour in the Heavy-Fermion System CeRu_2_Si_2_, J. Phys.: Condens. Matter, 15, S2171-2174, 20030401
- Magnetization curves of an Fe/Gd multilayer film calculated from Gd magenetization depth profiles determined by resonant x-ray magnetic scattering, J. Phys.= Condens. Matter, 14, 5289-5301, 20020401
- Studies of the pressure dependence of the charge density distribution in cerium phosphide by the maximum-entropy method, J. Physics: Cond. Matt., 14, ) 11143-11146, 20020401
- Pressure-Induced Magnetic Transition in Fe4N Probed by Fe K-edge XMCD Measurement, Nuclear Inst. and Methods in Physics Research, A467-8, 1061-1063, 20010401
- Pressure-induced phase transitions in lanthanide monoantimonides with a NaCl-type structure,, Physical Review B, 64, 132101, 20010401
- Magnetic structure of Fe/Gd multilayers determined by resonant x-ray magnetic scattering, Physical Review B, B60(13), 9596-9606, 19991001
- Charge-Magnetic Roughness Correlations in an Fe/Gd Multilayer, Physical Review B, 60, 12234-12238, 19990401
- Resonant X-ray magnetic scattering from a twisted states of an Fe/Gd multilayer, Physica, B248, 133-139, 19980401
- X-ray reflectivity at the L edges of Gd, Journal of Synchrotron Radiation, 4, 175-179, 19970701
- X-ray circular dichroic Bragg reflection from a GdCo/Ag multilayer, Japanese Journal of Applied Physics, 36, 4525-4530, 19970401
- Pressure-induced valence change toward the QCP in 4f-electron compounds determined by X-ray absorption spectroscopy, HIGH PRESSURE RESEARCH, 36(3), 419-428, 201609
- Applications of nano-polycrystalline diamond anvils to X-ray absorption spectroscopy under high pressure, HIGH PRESSURE RESEARCH, 36(3), 381-390, 201609
- X-ray absorption study of the local dipole moment in SrTiO3 under uniaxial pressure, JOURNAL OF THE KOREAN PHYSICAL SOCIETY, 66(9), 1386-1388, 201505
- Simultaneous Pressure-Induced Magnetic and Valence Transitions in Type-I Clathrate Eu8Ga16Ge30, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 83(1), 201401
- Pressure-Temperature Phase Diagram of Sm Valence State in a Heavy Fermion Compound SmOs4Sb12, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 82(2), 201302
- Glitch-free X-ray absorption spectrum under high pressure obtained using nano-polycrystalline diamond anvils, JOURNAL OF SYNCHROTRON RADIATION, 19, 768-772, 201209
- Instability of Co Spin Moment in ErCo2 Probed by Magnetic Compton Scattering under High Pressure, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 80(9), 201109
- Colossal negative thermal expansion in BiNiO3 induced by intermetallic charge transfer, NATURE COMMUNICATIONS, 2, 201106
- Noncollinear Spin Structure in Fe-Ni Invar Alloy Probed by Magnetic EXAFS at High Pressure, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 80(2), 201102
- Antiferromagnetic Phase Transition in Ordered FePt3 Investigated by Angle-Resolved Photoemission Spectroscopy, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 79(2), 201002
- Direct observation of the pressure-induced charge redistribution in BiNiO3 by x-ray absorption spectroscopy, PHYSICAL REVIEW B, 80(23), 200912
- X-ray magnetic spectroscopy at high pressure: performance of SPring-8 BL39XU, JOURNAL OF SYNCHROTRON RADIATION, 16, 730-736, 200911
- Luminescence mechanism of (Pr, Al)-doped SrTiO(3) fine particles investigated by x-ray absorption spectroscopy, PHYSICAL REVIEW B, 78(7), 200808
- Stability of ferromagnetism in Fe, Co, and Ni metals under high pressure, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 76(6), 200706
- Experimental evidence of pressure-induced suppression of the cobalt magnetic moment in ErCo2, PHYSICAL REVIEW B, 75(18), 200705
- X-ray magnetic circular dichroism study of the decoupling of the magnetic ordering of the Er and Co sublattices in Er1-xYxCo2 systems, PHYSICAL REVIEW B, 75(14), 200704
- Relationship between the magnetic moment of Lu and the magnetic behavior of (YyLu1-y)(Co1-xAlx)(2) from x-ray absorption spectroscopy and x-ray magnetic circular dichroism, PHYSICAL REVIEW B, 75(6), 200702
- Revealing Fe magnetism in lanthanide-iron intermetallic compounds by tuning the rare-earth L-2,L-3-edge x-ray absorption edges, PHYSICAL REVIEW B, 72(5), 200508
- Depth profile of spin and orbital magnetic moments in a subnanometer Pt film on Co, PHYSICAL REVIEW B, 72(5), 200508
- Magnetic phase transition in Laves phase DyCo2 probed by XRD and XMCD under high pressure, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 238(1-4), 167-170, 200508
- Experimental system for X-ray magnetic diffraction under extreme conditions, JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 65(12), 2089-2092, 200412
- Mg/Si ratios of aqueous fluids coexisting with forsterite and enstatite based on the phase relations in the Mg2SiO4-SiO2-H2O system, AMERICAN MINERALOGIST, 89(10), 1433-1437, 200410
- Magnetic structures of an iron-gadolinium multilayer at low temperatures, JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 41(3A), 1331-1339, 200203
- Direct metallographic analysis of an iron meteorite using hard x-ray photoelectron emission microscopy, IBM JOURNAL OF RESEARCH AND DEVELOPMENT, 55(4), 2011
- Novel Magnetic Domain Structure in Iron Meteorite Induced by the Presence of L1(0)-FeNi, APPLIED PHYSICS EXPRESS, 3(1), 2010
- Magnetic moment in the top Pt layer of Co/Pt bilayers, PHYSICA SCRIPTA, T115, 580-582, 2005
- Ga magnetic polarization in Mn3GaC under high pressure probed by GaK-edge XMCD, PHYSICA SCRIPTA, T115, 591-593, 2005
External Funds
Acceptance Results of Competitive Funds
- KAKENHI(Grant-in-Aid for Transformative Research Areas(A)), 2021, 2022
- KAKENHI(Grant-in-Aid for Scientific Research (B)), 2021, 2023
- KAKENHI, 2013, 2015
- KAKENHI, Study of Hydrogen effect on the electronic state of transition metal hydrides, 2011, 2012
- KAKENHI, Magnetic Anisotropy and Orbilal Magnetic Moment in Ordered FePt Nanoparticles, 2005, 2007
- KAKENHI, Mechanism and novel functions of pressure-induced superconductor-insulator transition in chalcogenide spinels, 2005, 2007
- KAKENHI, 2004, 2005
- KAKENHI, 2015
- KAKENHI(Fund for the Promotion of Joint International Research (Fostering Joint International Research)), 2016, 2017
- KAKENHI(Grant-in-Aid for Scientific Research (C)), 2017, 2019