Novel Frustrated Spin Chain System in KCu5V3O13
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概要
- 論文の詳細を見る
A powder sample of KCu5V3O13 was synthesized and is expected to represent a novel frustrated spin chain system based on its characteristic crystal structure. The magnetic susceptibility and the high-field magnetization process were investigated in order to elucidate the ground state of this spin chain system. From the results, the ground state of this compound appears to be an antiferromagnetically ordered state. The transition temperature was determined to be TN=7.8 K. However, there are some anomalous behaviors evident in both the susceptibility and the magnetization curves: the Curie constant and the Weiss temperature change markedly around 75 K, the gradient of the magnetization curve becomes small after a spin-flop transition, and the number of the ordered spins is only 1/5 of all the copper spins. Assuming that the other spins vanish by forming a spin-singlet state, the energy gap was estimated to be 44.3 K from the magnetization curve. Thus, the classical renormalized ordered state may coexist with the quantum disordered state. Two conceivable models have been proposed for the ground state.
- Physical Society of Japanの論文
- 2001-11-15
著者
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Yoshimura Kazuyoshi
Department Of Applied Science Tokyo Electrical Engineering College
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Mitsuda Akihiro
Institute For Molecular Science
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SAKURAI Hiroya
Department of Chemistry, Graduate School of Science, Kyoto University
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Goto Tsuneaki
Institute For Solid State Physics The University Of Tokyo
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Kosuge Koji
Department Of Chemistry Faculty Of Science
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Mitsuda Akihiro
Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581
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Sakurai Hiroya
Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502
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Yoshimura Kazuyoshi
Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502
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