Magnetic Field-Induced Phase Transition in Quantum Spin System Cu_2Cl_4・H_8C_4SO_2(Field-Induced Magnetic Ordering, Field-Induced Phase Transitions and Dynamics in Quantum Spin Systems)
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概要
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Cu_2Cl_4・H_8C_4SO_2 is an S=1/2 double chain antiferromagnet, which has a singlet ground state with an excitation gap of Δ/k_B=5.13K. The specific heat was measured in magnetic fields up to 9T. The magnetic phase transition due to interchain interactions was observed for H≳4T. Magnetic phase diagram was obtained for H‖b- and c-axes. The phase boundaries for these two field directions coincide when normalized by the g-factor. The phase boundary can be represented by the power law (g/2)[H_N(T)-H_g]∝T^φ with (g/2)H_g=3.83T and φ=1.98.
- 理論物理学刊行会の論文
- 2005-10-31
著者
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SAKAKIBARA Toshiro
Institute for Solid State Physics, University of Tokyo
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FUJISAWA Masashi
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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Sakakibara Toshiro
Institute For Solid State Physics The University Of Tokyo
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Fujisawa Masashi
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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SAKAKIBARA Toshiro
Institute for Solid State Physics, The University of Tokyo
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