Experimental Examination of Chain-Dimer Model in Ca_<1-x>CuO_2 (x=0.164) by High Field ESR Measurements(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
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概要
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Intensive high-field ESR studies have been performed to investigate the peculiar ground state of a quasi-one dimensional cupric oxide Ca_<1-x>CuO_2 (x=0.164), to which a two-sublattice model (chain-dimer model) composed of a Heisenberg anti ferromagnetic chain and dimer state with low spin density is proposed from the results of magnetic susceptibility and specific heat measurements. Using the powder sample and high frequency sources from 60 to 490GHz, we observed antiferromagnetic resonance mode with a typical frequency-field relation of the easy-axis type at 1.8K. Moreover, weak ESR signals are also observed in the ordered state. From the analysis of the integrated intensity for those weak signals, it is found that the dimer model reproduces the temperature dependent behaviors quite well. These results support the chain-dimer model from the microscopic point of view.
- 社団法人日本物理学会の論文
- 2004-06-15
著者
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広井 善二
京都大学化学研究所
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HIROI Zenji
Institute for Solid State Physics, University of Tokyo
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TAKANO Mikio
Institute for Chemical Research, Kyoto University
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広井 善二
Institute For Solid State Physics University Of Tokyo
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OKUBO Susumu
Venture Business Laboratory, Kobe University
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OHTA Hitoshi
Venture Business Laboratory, Kobe University
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INAGAKI Yuji
Venture Business Laboratory, Kobe University
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Okumura Makoto
Nippon Steel Corp.
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Hiroi Z
Institute For Solid State Physics University Of Tokyo
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Hiroi Zenji
Institute For Chemical Research Kyoto University
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Takano M
Institute For Chemical Research Kyoto University
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Takano M
Kyoto Univ. Kyoto
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Takano Mikio
Department Of Chemistry Faculty Of Science Konan University
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Takano Mikio
Institute For Chemical Research (icr) Kyoto University
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Okubo S
Molecular Photoscience Research Center Kobe University:venture Business Laboratory Kobe University
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Okubo Susumu
Institute For Materials Research Tohoku University
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INAGAKI Yuji
The Graduate School of Science and Technology, Kobe University
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HIROI Zenji
ISSP, University of Tokyo
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Okumura M
Institute For Chemical Research Kyoto University
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UEDA Atsushi
The Graduate School of Science and Technology, Kobe University
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OKUMURA Makoto
Institute for Chemical Research, Kyoto University
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Inagaki Y
Department Of Applied Quantum Physics And Nuclear Engineering Faculty Of Engineering Kyushu Universi
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Mitsui Takaya
Crest Japan Science And Technology Agency:japan Atomic Energy Agency
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Hiroi Z
Univ. Tokyo Kashiwa Jpn
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Okubo Susumu
Department Of Physics And Astronomy University Of Rochester
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Inagaki Yuji
Department Of Physics Kyushu University
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Ueda Atsushi
The Graduate School Of Science And Technology Kobe University
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Inagaki Yuji
Department of Applied Quantum Physics and Nuclear Engineering Faculty of Engineering, Kyushu University
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OKUBO Susumu
Venture Business Laboratory, Kobe University:Molecular Photoscience Research Center, Kobe University
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