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2004 Fiscal Year Final Research Report Summary

Investigations of new field induced quantum phenomena in magnetic systems by high field ESR and neutron diffraction measurements

Research Project

Project/Area Number 13130204
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

Allocation TypeSingle-year Grants
Review Section Science and Engineering
Research InstitutionKobe University

Principal Investigator

OHTA Hitoshi  Kobe University, Molecular Photoscience Research Center, Professor, 分子フォトサイエンス研究センター, 教授 (70194173)

Co-Investigator(Kenkyū-buntansha) KABURAGI Makoto  Kobe University, Faculty of Cross-Cultural Studies, Professor, 国際文化学部, 教授 (40093504)
OKUBO Susumu  Kobe University, Molecular Photoscience Research Center, Research Associate, 分子フォトサイエンス研究センター, 助手 (80283901)
NOJIRI Hiroyuki  Tohoku University, IMR, Professor, 金属材料研究所, 教授 (80189399)
KIKUCHI Hikomitsu  University of Fukui, Department of Physics, Associate Professor, 工学部, 助教授 (50234191)
Project Period (FY) 2001 – 2004
Keywordsmagnetism / experiments / quantum phenomena / high field ESR / high Pressure / frustration / magnetization plateau
Research Abstract

New model substances for diamond chain, delta chain and zig-zag chain systems are found, and following new field induced quantum phenomena have been investigated.
1) The model substance of diamond chain Cu_3(CO_3)_2(OH)_2 has been found for the first time. The magnetic susceptibility result shows two peaks and it suggests that two kinds of short range order exist in the system. Low temperature magnetization measurements show 1/3 magnetization plateau, which has been observed in the diamond chain model substance for the first time. The exchange interactions of Cu_3(CO_3)_2(OH)_2 are determined by analyzing the magnetization curve by the theory. High field ESR measurements of shows the dynamics of the system and the direct transition which changes at the magnetization plateau.
2) The breather mode up to the saturation magnetization, the decrease of the field induce gap under the high field and the cross-over effect of the excited mode above the saturation field have been observed in the on … More e dimensional antiferromagnet Cu-benzoate. The breather mode is also observed in the one dimensional mixed crystal system BaCu_2(Si_<1-x>Gex)_2O_7.
3) Two-triplet bound state is investigated in details for two dimensional dimer system SrCu_2(BO_3)_2.
4) The magnetization plateau has been observed in the giant magnetic molecule for the first time, and the frustration effect in the system is discussed.
5) High field ESR system under high pressure has been developed. The suppression of the spin gap under pressure at 4.2 K has been observed directly in the dimer system KCuCl_3 by observing the direct transition using our new high field ESR system under pressure up to 10 kbar.
6) The fine energy structure of the finite Haldane chain system has been investigated by high field ESR. Owing to the high spectral resolution by high fields and high frequencies, observed ESR signals can be separated into the contributions of the finite chains with various chain length. The chain length dependence of the interaction has been obtained experimentally for the first time, and the correlation length in the real system is discussed. Less

  • Research Products

    (43 results)

All 2005 2004 2003 2002 2001

All Journal Article (38 results) Book (4 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Energy Structure of a Finite Haldane Chain in Y_2BaNi_<0.96>Mg_<0.04>O_5 Studied by High Field Electron Spin Resonance2005

    • Author(s)
      M.Yoshida
    • Journal Title

      Phys.Rev.Lett 95巻

      Pages: 117202 (4)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Competing Spin Phases in Geometrically Frustrated Magnetic Molecules2005

    • Author(s)
      C.Schroder
    • Journal Title

      Phys.Rev.Lett. 94巻

      Pages: 017205 (4)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Experimental Observation of the 1/3 Magnetization Plateau in a Diamond Chain Compound Cu_3(CO_3)_2(OH)_22005

    • Author(s)
      H.Kikuchi
    • Journal Title

      Phys.Rev.Lett. 94巻

      Pages: 227201 (4)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Energy Structure of a Finite Haldane Chain in Y_2BaNi_<0.96>Mg_<0.04>0_5 Studied by High Field Electron Spin Resonance2005

    • Author(s)
      M.Yoshida, K.Shiraki, S.Okubo, H.Ohta, T.Ito, H.Takagi, M.Kaburagi, Y.Ajiro
    • Journal Title

      Phys.Rev.Lett. 95

      Pages: 117202(4)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Competing Spin Phases in Geometrically Frustrated Magnetic Molecules2005

    • Author(s)
      C.Schroder, H.Nojiri, J.Schnack, P.Hage, M.Luban, P.Koegrler
    • Journal Title

      Phys.Rev.Lett. 94

      Pages: 017205(4)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Experimental Observation of the 1/3 Magnetization Plateau in a Diamond Chain Compound Cu_3(CO_3)_2(OH)_22005

    • Author(s)
      H.Kikuchi, Y.Fujii, M.Chiba, S.Mitsudo, T.Idehara, T.Tonegawa, K.Okamoto, T.Sakai, T.Kuwai, H.Ohta
    • Journal Title

      Phys.Rev.Lett. 94

      Pages: 227201(4)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Recent high field ESR studies of low-dimensional quantum spin systems in Kobe2004

    • Author(s)
      H.Ohta
    • Journal Title

      Physica B 346-347巻

      Pages: 38-44

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Magnetic characterization of the frustrated three-leg ladder compound [(CuCl_2tachH)_3Cl]Cl_22004

    • Author(s)
      J.Schnack
    • Journal Title

      Phys.Rev.B 70巻

      Pages: 174420 (5)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] NMR study of S = 1/2 quasi-two dimensional antiferromagnet Cs_2CuBr_42004

    • Author(s)
      Y.Fujii
    • Journal Title

      Physica B 346-347巻

      Pages: 45-49

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Magnetization Process of An Ising-Type Frustrated S=1 Spin Chain2004

    • Author(s)
      M.Kaburagi
    • Journal Title

      J.Phys. : Condens. Matter 16巻

      Pages: S765-S772

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Recent high field ESR studies of low-dimensional quantum spin systems in Kobe2004

    • Author(s)
      H.Ohta, S.Okubo, Y.Inagaki, Z.Hiroi, H.Kikuchi
    • Journal Title

      Physica B 346-347

      Pages: 38-44

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Magnetic characterization of the frustrated three-leg ladder compound [(CuCl_2tachH)_3Cl]Cl_22004

    • Author(s)
      J.Schnack, H.Nojiri, P.K.Gerler, Geooerey J.T.Cooper, Leroy Cronin
    • Journal Title

      Phys.Rev.B 70

      Pages: 174420(5)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] NMR study of S = 1/2 quasi-two dimensional antiferromagnet Cs_2CuBr_42004

    • Author(s)
      Y.Fujii, T.Nakamura, H.Kikuchi, M.Chiba, T.Goto, S.Matsubara, K.Kodama, M.Takigawa
    • Journal Title

      Physica B 346-347

      Pages: 45-49

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Magnetization Process of An Ising-Type Frustrated S=1 Spin Chain2004

    • Author(s)
      M.Kaburagi, M.Kang, T.Tonegawa, K.Okunishi
    • Journal Title

      J.Phys.: Condens.Matter 16

      Pages: S765-S772

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] High Field ESR Study of the S=1/2 Diamond-Chain Substance Cu_3(CO_3)_2(OH)_2 up to the Magnetization Plateau Region2003

    • Author(s)
      H.Ohta
    • Journal Title

      J.Phys.Soc. Jpn. 72巻

      Pages: 2464-2467

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] ESR Study on the Excited State Energy Spectrum of SrCu_2(BO_3)_2-A Central Role of Multiple-Triplet Bound States-2003

    • Author(s)
      H.Nojiri
    • Journal Title

      J.Phys.Soc.Jpn. 72巻

      Pages: 3243-3253

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Magnetic properties of the frustrated diamond chain compound Cu_3(CO_3)_2(OH)_22003

    • Author(s)
      H.Kikuchi
    • Journal Title

      Physica B 329-333巻

      Pages: 967-968

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Impurity Spin Effect on the Spin-1 Antiferromagnetic Heisenberg Chain2003

    • Author(s)
      M.Kaburagi
    • Journal Title

      J.Phys.Soc.Jpn.Suppl.B 72巻

      Pages: 135-140

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] High Field ESR Study of the S=1/2 Diamond-Chain Substance Cu_3(CO_3)_2(OH)_2 up to the Magnetization Plateau Region2003

    • Author(s)
      H.Ohta, S.Okubo, T.Kamikawa, T.Kunimoto, Y.Inagaki, H.Kikuchi, T.Saito, M.Azuma, M.Takano
    • Journal Title

      J.Phys.Soc.Jpn. 72(10)

      Pages: 2464-2467

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] ESR Study on the Excited State Energy Spectrum of SrCu_2(B0_3)_2-A Central Role of Multiple-Triplet Bound States-2003

    • Author(s)
      H.Nojiri, H.Kageyama, Y.Ueda, M.Motokawa
    • Journal Title

      J.Phys.Soc.Jpn. 72

      Pages: 3243-3253

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Magnetic properties of the frustrated diamond chain compound Cu_3(CO_3)_2(OH)_22003

    • Author(s)
      H.Kikuchi, Y.Fujii, M.Chiba, S.Mitsudo, T.Idehara
    • Journal Title

      Physica B 329-333

      Pages: 967-968

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Impurity Spin Effect on the Spin-1 Antiferromagnetic Heisenberg Chain2003

    • Author(s)
      M.Kaburagi, T.Tonegawa, M.Kang
    • Journal Title

      J.Phys.Soc.Jpn. 72 Suppl.B

      Pages: 135-140

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] High Field ESR Study of BaCu_2(Si_<1-x>Ge_x)_2O_7 Single Crystal2002

    • Author(s)
      H.Ohta
    • Journal Title

      Prog.Theor.Phys.Suppl 145巻

      Pages: 95-100

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Magnetic Properties of a Random-bond Ladder Cu_2(C_5H_<12>N_2)_2(Cl_<1-x>Br_x)_4 at Low Temperatures2002

    • Author(s)
      H.Deguchi
    • Journal Title

      Mol.Crys.Liq.Cryst. 376巻

      Pages: 353-358

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] NMR evidence of a gapless chiral phase in the S = 1 zigzag antiferromagnet CaV_2O_42002

    • Author(s)
      H.Fukushima
    • Journal Title

      Prog.Theor.Phys.Suppl 145巻

      Pages: 72-75

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] An S=1/2 lmpuritySpin in the Antiferromagnets S=1 Bond-Alternating Chain2002

    • Author(s)
      N.Ogawa
    • Journal Title

      Prog.Theor.Phys.Suppl 145巻

      Pages: 156-169

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] High Field ESR Study of BaCu_2(Si_<1-x>Ge_X)_2O_7 Single Crystal2002

    • Author(s)
      H.Ohta, K.Kawakami, Y.Inagaki, S.Okubo, T.Kunimoto, Z.Hiroi
    • Journal Title

      Progr.Theor.Phys.Suppl. 145

      Pages: 95-100

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Magnetic Properties of a Random-bond Ladder Cu_2(C_5H_<12>N_2)_2(Cl_<1-x>Вr_x)_4 t Low Temperatures2002

    • Author(s)
      H.Deguchi, H.Watanabe, S.Yamamoto, S.Takagi, M.Mito, T.Kawae, K.Takeda, H.Nojiri, M.Motokawa
    • Journal Title

      Mol.Crys.Liq.Cryst. 376

      Pages: 353-358

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] NMR evidence of a gapless chiral phase in the S = 1 zigzag antiferromagnet CaV_2O_42002

    • Author(s)
      H.Fukushima, H.Kikuchi, M.Chiba, Y.Fujii, Y.Yamamoto, H.Hori
    • Journal Title

      Prog.Theor.Phys.Suppl 145

      Pages: 72-75

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] An S=1/2 Impurity Spin in the Antiferromagnets S=1 Bond-Alternating Chain2002

    • Author(s)
      N.Ogawa, T.Hikihara, M.Kaburagi, T.Tonegawa
    • Journal Title

      Progr.Theor.Phys.Suppl. 145

      Pages: 156-169

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] High Frequency ESR Measurements Using Pulsed Magnetic Fields in Kobe2001

    • Author(s)
      H.Ohta
    • Journal Title

      Physica B 294-295巻

      Pages: 624-629

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Electron Spin Resonance Study of Cu Benzoate using a ^3He-^4He Dilution Refrigerator2001

    • Author(s)
      T.Sakon
    • Journal Title

      J.Phys.Soc. Jpn. 70巻

      Pages: 2259-2262

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Possible gapless chiral phase in an frustrated S = 1 1 D antiferromagnet CaV_2O_42001

    • Author(s)
      H.Kikuchi
    • Journal Title

      Can.J.Phys 79巻

      Pages: 1551-1555

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Ground-state phase diagrams of frustrated spin-S XXZ chains : Chiral ordered phases2001

    • Author(s)
      T.Hikihara
    • Journal Title

      Phys.Rev.B 63巻

      Pages: 174430 (11)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] High Frequency ESR Measurements Using Pulsed Magnetic Fields in Kobe2001

    • Author(s)
      H.Ohta, S.Okubo, T.Sakurai, T.Goto, K.Kirita, K.Ueda, Y.Uwatoko, T.Saito, M.Azuma, M.Takano, J.Akimitsu
    • Journal Title

      Physica B 294-295

      Pages: 624-629

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Electron Spin Resonance Study of Cu Benzoate using a ^3He-^4He Dilution Refrigerator2001

    • Author(s)
      T.Sakon, H.Nojiri, K.Koyama, T.Asano, Y.Ajiro, M.Motokawa
    • Journal Title

      J.Phys.Soc.Jpn. 70

      Pages: 2259-2262

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Possible gapless chiral phase in an frustrated S = 1 1D antiferromagnet CaV_2O_42001

    • Author(s)
      H.Kikuchi, M.Chiba, T.Kubo
    • Journal Title

      Can.J.Phys. 79

      Pages: 1551-1555

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Ground-state phase diagrams of frustrated spin-S XXZ chainsChiral ordered phases2001

    • Author(s)
      T.Hikihara, M.Kaburagi, H.Kawamura:
    • Journal Title

      Phys.Rev. B63(11 pages)

      Pages: 174430

    • Description
      「研究成果報告書概要(欧文)」より
  • [Book] Field-Induced Phase Transitions and Dynamics in Quantum Spin Systems2005

    • Author(s)
      K.Kindo, Y.Ueda, H.Ohta, H.Tanaka
    • Total Pages
      416
    • Publisher
      Prog.Theo Phys Suppl. 159 (2005)
    • Description
      「研究成果報告書概要(和文)」より
  • [Book] Application of Submillimeter Wave Electron Spin Resonance for Novel Magnetic Systems2003

    • Author(s)
      H.Ohta, H.Nojiri, M.Motokawa
    • Total Pages
      183
    • Publisher
      IPAP, J. Phys. Soc. Jpn. 72 (2003) Supplement B
    • Description
      「研究成果報告書概要(和文)」より
  • [Book] 電子スピンサイエンス&スピンテクノロジー入門2003

    • Author(s)
      電子スピンサイエンス学会監修
    • Total Pages
      268
    • Publisher
      日本学会事務センター
    • Description
      「研究成果報告書概要(和文)」より
  • [Book] EPR in the 21st Century : Basics and Applications to Material, Life and Earth Sciences2002

    • Author(s)
      A.Kawamori, J.Yamauchi, H.Ohta
    • Total Pages
      830
    • Publisher
      Elsevier
    • Description
      「研究成果報告書概要(和文)」より
  • [Patent(Industrial Property Rights)] カンチレバーによる磁化検出を応用したパルス磁場による高磁場・高周波電子スピン共鳴(ESR)測定装置2004

    • Inventor(s)
      太田 仁, 大道 英二
    • Industrial Property Rights Holder
      太田 仁, 大道 英二
    • Industrial Property Number
      特許権, 特願2004-215203号
    • Filing Date
      2004-07-23
    • Description
      「研究成果報告書概要(和文)」より

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Published: 2008-05-27  

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