Structural and Magnetic Properties of S=1/2 Kagome Antiferromagnet Cs_2Cu_3ZrF_<12>(Frustrated Systems, Field-Induced Phase Transitions and Dynamics in Quantum Spin Systems)
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概要
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Magnetization, specific heat and X-ray measurements have been carried out on Cs_2Cu_3ZrF_<12> which is a candidate of a two-dimensional S=1/2 Heisenberg Kagome antiferromagnet. A structural phase transition was observed at T_t≃210K. The hexagonal unit cell is enlarged to 2a, 2a, c below T_t. A jump was observed in the susceptibility at T_t. The magnetic susceptibility obeys the Curie-Weiss law with the Weiss constants θ=-355K and θ=-300K above and below T_t, respectively. Weak ferromagnetic behavior was observed below T_<wf>≃30K. However, specific heat exhibits no anomaly at T_<wf>.
- 理論物理学刊行会の論文
- 2005-10-31
著者
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TANAKA Hidekazu
Research Center for Low Temperature Physics, Tokyo Institute of Technology
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ONO Toshio
Department of Physics, Tokyo Institute of Technology
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UEKUSA Hidehiro
Department of Chemistry, Tokyo Institute of Technology
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Hiraoka T
Faculty Of Integrated Arts And Science Hiroshima University
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Ono T
Department Of Physics Tokyo Institute Of Technology
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Ono Toshio
Department Of Oral Biochemistry Nagasaki University School Of Dentistry
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Uekusa H
Department Of Chemistry And Materials Science Tokyo Institute Of Technology
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SUTO Takanori
Department of Physics, Tokyo Institute of Technology
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Hiraoka T
Faculty Of Science And Engineering Saga University
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Uekusa Hidehiro
Department Of Chemistry And Material Science Tokyo Institute Of Technology
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Tanaka Hidekazu
Department Of Physics Tokyo Institute Of Technology
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Tanaka H
Department Of Physics Rikkyo University
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Suto Takanori
Department Of Physics Tokyo Institute Of Technology
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Tanaka Hidekazu
Research Center For Low Temperature Physics Tokyo Institute Of Technology
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