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Theory of Ordered State of Multiparty Freedoms of Atoms and X-Ray Spectroscopy and Scattering

Research Project

Project/Area Number 13640365
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 固体物性Ⅱ(磁性・金属・低温)
Research InstitutionHIROSHIMA UNIVERSITY

Principal Investigator

JO Takeo  Advanced Sciences of Matter, Department of Quantum Matter, Professor, 大学院・先端物質科学研究科, 教授 (20093487)

Co-Investigator(Kenkyū-buntansha) SHIMAHARA Hiroshi  Advanced Sciences of Matter, Department of Quantum Matter, Associate Professor, 大学院・先端物質科学研究科, 助教授 (40226220)
TANAKA Arate  Advanced Sciences of Matter, Department of Quantum Matter, Research Associate, 大学院・先端物質科学研究科, 助手 (70253052)
Project Period (FY) 2001 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 2002: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2001: ¥700,000 (Direct Cost: ¥700,000)
Keywordsx-ray linear dichroism / resonant x-ray scattering / perovskite / vanadium oxides / spin-orbit interaction / ペロフスカイト / ヴァナジウム酸化物 / スピン軌道相互作用 / バナジウム酸化物
Research Abstract

(1) Orbital States in Perovskite-Type Transition-Metal Oxides and X-Ray Absorption Linear Dichroism
We investigated the effect of 3d spin-orbit interaction in V ion in vanadium perovskite-type oxides including LaVO3 and YVO3 on the basis of the perturbation calculation with respect to the V-V Electron transfer and showed that the orbital magnetic moment of V can considerably contribute to the total moment. For YTi03, where in addition the ferromagnetic component in the c-direction, more-than-one kinds of antiferromagnetic modulations are observed in the ab plane, we proposed that a non-collinearity between the spin and orbital moments can explain the more-than-one additional modulations. We furthermore pointed out that the x-ray absorption on linear dichroism signal is to be observed in many perovskites with antihero-orbital orderings, which is in sharp contrast to the absence of x-ray absorption magnetic circular dichroism signal in antiferromagnets.
(2) Theory of Antiferromagnetic Ordering in V203
V203 is know to exhibit a metal-insulator transition with decreasing the temperature. In the low temperature antiferromagnetic phase, the crystal symmetry changes from the corundum structure in the high temperature phase to the monoclinic one and it shows anomalous magnetic structure reflecting the low symmetry crystal structure. We calculated, by extending the V-ion pair model, the exchange interaction between V-ion pairs and showed that the sign of the exchange interaction is sensitive to the lattice distortion and explain the magnetic ordering without assuming the so far proposed orbital-ordering model.

Report

(3 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • Research Products

    (17 results)

All Other

All Publications (17 results)

  • [Publications] T.Jo: "Linear Dichroism in X-Ray Absorption and Orbital Ordering"Journal of the Physical Society of Japan. 71. 3094-3095 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T.Jo: "On the Orbital Magnetic Moment of V Ion in Vanadium Perovskites"Journal of the Physical Society of Japan. 72. 155-159 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] A.Tanaka: "Electronic Structure and Phase Transition in V_2O_3: Importance of 3d Spin-Orbitlnteraction and Lattice Distortion"Journal of the Physical Society of Japan. 71. 1091-1107 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] G.Ghiringhelli: "3d spin-orbit photoemission spectrum of nonferromagnetic materials : The test cases of CoO and Cu"Physical Review B. 66. 075101-1-075101-7 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T.Jo: "On the magnetic State of Titanium Ion in YTiO3"Journal of the Physical Society of Japan. (to be published).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T. Jo: "Linear Dichroism in X-Ray Absorption and Orbital orderings"Journal of the physical Society of Japan. 71-12. 3094-3095 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T. Jo: "On the Orbital Magnetic Moment of V Ion in Vanadium Perovskite"Journal of the physical Society of Japan. 72-1. 155-159 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] A. Tanaka: "Electronic Structure and Phase Transition in V203: Importance of 3d Spin-orbit Interaction and Lattice Distortion"Journal of the Physical society of Japan. 71-4. 1091-1107 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] G. Ghiringhelli: "3d spin-orbit photoemission spectrum of non-Ferromagnetic materials: The test cases of Co0 and Cu"Physical Review. B,66. 075101-1-075101-7 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T.Jo: "Linear Dichroism in X-Ray Absorption and Orbital Ordering"Journal of the Physical Society of Japan. 71・12. 3094-3095 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] T.Jo: "On the Orbital Magnetic Moment of V Ion in Vanadium Perovskites"Journal of the Physical Society of Japan. 72・1. 155-159 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] A.Tanaka: "Electronic Structure and Phase Transition in V_2O_3 : Importance of 3d Spin-Orbitlnteraction and Lattice Distortion"Journal of the Physical Society of Japan. 71・4. 1091-1107 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] G.Ghiringhelli: "3d spin-orbit photoemission spectrum of nonferromagnetic materials : The test cases of CoO and Cu"Physical Review B. 66. 075101-1-075101-7 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] T.Jo: "Hartree-Fock study of orbital magnetic moments in 3d and 5f magnets and X-rav magnetic circular dichroism"Journal of Synchrotron Radiation. 8. 115-119 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] T.Jo: "Theory of resonant spectroscopies in nickel, cerium compounds and other systems"Journal of Electron Spectroscopy and Related Phenomena. 117-118. 397-411 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] T.Jo: "Orbital Ordering and Jahn-TelIer Distortion in YTiO3"Journal of the Physical Society of Japan. 70・10. 3080-3081 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] A.Tanaka: "Electronic Structure and Phase Transition in V203: Importance of 3d Spin-Orbit Interaction and Lattice Distortion"Journal of the Physical Society of Japan. 71・1(発表予定). (2002)

    • Related Report
      2001 Annual Research Report

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Published: 2001-04-01   Modified: 2020-05-15  

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