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Experimental Study of New Universality Classes in Magnetic Phase Transition

Research Project

Project/Area Number 05640409
Research Category

Grant-in-Aid for General Scientific Research (C)

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

Principal Investigator

AJIRO Yoshitami  FUKUI UNIVERSITY,APPLIED PHYSICS,ASSOCIATE PROFESSOR, 工学部, 助教授 (00025438)

Project Period (FY) 1993 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1994: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1993: ¥1,400,000 (Direct Cost: ¥1,400,000)
KeywordsPhase transition / Universality / Phase diagram / Triangular lattice / One-dimensional magnet / Quantum spin / 磁気相転移 / 三角格子反強磁性体
Research Abstract

The purpose of the present research is to elucidate the phase transitions in low dimensional magnetic system, such as frustrated triangular lattice antiferromagnet and quantum spin one-dimensional antiferromagnet.We performed the experimental study on various model substances using nuclear magnetic resonance (NMR), electron spin resonance (ESR), neutron scattering, susceptibity and high field magnetization maeasuments.
1.Triangular lattice antiferromagnet
Our precise measurements between 1.4K and 300K under static magnetic fields up to 40 T,occasionally up to 110 T,revealed a rich variety of magnetic phase transitions in the stacked triangular lattice antiferromagnets ABX3 and AMO2, including a novel phase transition which belongs to a new universality class linked to chiral degeneracy.The magnetic field versus temoerature phase diagrams are classified into two types depending on their magnetic antisotropies.
2.Quantum spin system
Nonmagnetic groud states due to quantum spin effect were studied for one-dimensional Heisenberg systems.We observed remarkable differneces in the nonmagnetic impurity efect on the Haldane system, spin-Peierls system and alternating linear chain system and disscussed the physical sihnificance of the results.

Report

(3 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • Research Products

    (28 results)

All Other

All Publications (28 results)

  • [Publications] H.Katori: "Magnetic Phase Diagram of the Triangular Lattice Antiferromagnets,CsMnI_3 and CsNiBr_3" J.Phys.Soc.Jpn.62. 743-749 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.kato: "Neutron Diffbraction Study of the Magnetic Phase Diagram of RbMaBr_3-Observation of the Critical Line of Field-Induced Phase Transition-" J.Phys.Soc.Jpn.62. 3384-3387 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] M.Chiba: "Anomalous Spectrum of ^<133>Cs NMR in CsCuCl_3 around the Applied Field 11T" J.Phys.Soc.Jpn.62. 4186-4189 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Ajiro: "High Field Magnetization of a One-Dinensional S=1/2 Trimer System 3CuCl_2,2dioxare" J.Phys.Soc.Jpn.63. 859-862 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Asano: "Single Crystol Susceptibility of the S=1 One-Dimensional Heiseberg Antiferromagnet AgVP_2S_6" Solid State Commun.90. 125-128 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Ajiro: "High Field Magnetization Process in Triangular Lattice Antiferromagnet CuFeO_2" Physica B. 201. 71-74 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Katori, T.Goto, Y.Ajiro: "Magnetic Phase Diagram of the Triangular Lattice Antiferromagnets.CsMnI3 and CsNiBr3" J.Phys.Soc.Jpn.62. 743-749 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Kato, T.Ishii, Y.Ajiro, T.Asano, S.Kawano: "Neutron Diffraction Study of the Magnetic Phase Diagram of RbMnBr3-Observation of the Critical Line of Field-Induced Phase Transition-" J.Phys.Soc.Jpn.62. 3384-3387 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] M.Chiba, K.Ohara, Y.Ajiro, T.Morimoto: "Anomalous Spectrum of 133Cs NMR in CsCuCl3 around the Applied Field 1l T" J.Phys.Soc.Jpn.62. 4186-4189 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Ajiro, T.Asano, T.Takagi, M.Mekata, H.Katori, T.Goto: "High Field Magnetization Process in Triangular Lattice Antiferromagnet CuFe02" Physica B. 201. 71-74 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Asano, Y.Ajiro, M.Mekata, H.Katori T.Goto: "Magnetic Phase Diagram of the Triangular Lattice Antiferromagnet ABX3 under High Magnetic Field" Physica B. 201. 75-79 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Inami, Y.Ajiro, T.Goto: "Magnetization Process of the One-Dimensional Ising-like Antiferromagnet with Nonmagnetic Impurity, CsCo1-xMgxCl3" Physica B. 201. 204-207 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Asano, Y.Ajiro, M.Mekata, H.Yamazaki, N.Hosoito, T.Shinjo, H.Kikuchi: "Single Crystal Susceptibility of the S=1 One Dimensional Heisenberg Antiferromagnet AgVP2S6" Solid State Commun.90. 125-128 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Ajiro, T.Asano, T.Inami, H.Katori, T.Goto: "High Field Magnetization of a One-Dimensional S=1/2 Trimer System, 3CuCl2.2dioxane" J.Phys.Soc.Jpn.63. 859-862 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Kobayashi, A.Koda, K.Amaya, H.Deguchi, K.Takeda, T.Asano, Y.Ajiro, M.Mekata: "Low Temperature Thermal and Magnetic Properties of Haldane-Gap Antiferromagnet.TWNIN" J.Phys.Soc.Jpn.63. 1961-1966 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Kobayashi, A.Koda, K.Amaya, H.Deguchi, K.Takeda, T.Asano, Y.Ajiro, M.Mekata: "Heat Capacities of Haldane-Gap Antiferromagnets NENP and TWNIN under Magnetic Field" Physica B. 194-196. 1259-1260 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Kikuchi, Y.Ajiro, T.Asano, H.Katori, T.Goto: "Nonmagnetic Impurity Effect on Haldane-Gap System NiC204.2DMIz" Physica B. 201. 186-191 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] M.Chiba, Y.Ajiro, T.Morimoto: "NMR Study on the Quantum Spin Effect on the One-Dimensional Magnet in High Magnetic Fields" Physica B. 201. 200-203 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] A.Keren, L.P.Le, G.M.Luke, W.D.Wu, Y.J.Uemura, Y.Ajiro, T.Asano, H.Kuriyama, M.Mekata, H.Kikuchi: "Muon Spin Relaxation Measurements in Kagome Lattice System SrCr8Ga4019" Hyperfine Interactions. 85. 181-186 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.J.Uemura, A.Keren, K.Kojima, L.P.Le, G.M.Luke, W.D.Wu, Y.Ajiro, T.Asano, Y.Kuriyama, M.Mekata, K.Kakurai, K.Kikuchi: "Spin Fluctuations in Frustrated Kagome Lattice System SrCr8Ga4019 Studied by Muon Spin Relaxation" Phys.Rev.Lett.73. 3306-3309 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Ajiro, T.Asano, F.Masui, M.Mekata, H.Katori, T.Goto, H.Kikuchi: "Remarkable Difference in the Effects of Normagnetic Impurities on the Haldane and Spin-Peierls Systems" Phys.Rev.B. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Katori, Y.Ajiro, T.Asano, T.Goto: "Nonlinear Magnetization of Quasi-One-Dimensional Triangular Antiferromagnet CsNiCl3 up to 110 T" J.Phys.Soc.Jpn.(to be published).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Nojiri, Y.Simamoto, N.Miura, Y.Ajiro: "Obsevation of Magnetization Saturation in S=1 One-Dimensional Heisenberg Antiferromagnet NENP and CsNiCl3" J.Phys.C. (to be published).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Aruga: "Magnetic Phase Diagrams of the Triangular Latlice Antiferromagnets CsMnI_3 and CsNiBr_3" J.Phys.Soc.Jpn.62. 743-749 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] T.Kato: "Neutron Diffraction Study of the Magnetic Phase Diagram of RbMnBr_3" J.Phys.Soc.Jpn.62. 3384-3387 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] M.Chiba: "Anomalous Spectrum of ^<133>Cs NMR in CsCuCl_3 around the Applied Field IPT" J.Phys.Soc.Jpn.62. 4186-4189 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Y.Ajiro: "High Field Magnetization of a One-Dimensional S=1/2 Trimer System 3CuCl_2・2dioxane" J.Phys.Soc.Jpn.63. 859-862 (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] T.Asano: "Single Crystal Susceptibility of the S=1 One-Dimensional Heisenberg Antiferromagnet AgVP_2S_6" Solid State Commun.88. 795-798 (1994)

    • Related Report
      1993 Annual Research Report

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Published: 1993-04-01   Modified: 2020-05-15  

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