Thermal and Magnetic Study of CoBr_2・6H_2O
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概要
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The measurements of specific heats, isentropic curves and isothermal susceptibilities under an external field are carried out for single crystals of CoBr_2・6H_2O. The hysteresis is observed at the phase boundary between antiferromagnetic (AF) and spin-flopping (SF) states. The molecular field constants are calculated from the magnetic specific heat and the magnetic phase diagram. The two kinds of path in exchange interaction at the ab plane, so called J_1 and J_2 are estimated as 1.75k_B and 1.13k_B respectively. The other path of exchange interaction J_3 along the c axis, is determined as 0.57k_B. The critical exponents of specific heat near the Neel point are shown as α=0.6±0.1 and α'=-0.1±0.1 at zero magnetic field.
- 社団法人日本物理学会の論文
- 1975-09-15
著者
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Watanabe Takashi
Department of Chemistry, Graduate School of Science, Kyoto University
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Kida Jun
Japan Electron Optics Laboratory Ltd.
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OKAJI Masahiro
Department of Physics, Faculty of Science, Hokkaido University
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Okaji Masahiro
Department Of Physics Faculty Of Science Hokkaido University
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Watanabe Takashi
Department Of Cardiothoracic Surgery Nagoya University School Of Medicine
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Watanabe Takashi
Department Of Applied Physics Tohoku University
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