Specific Heat of Ni(NH_3)_2Ni(CN)_4・2C_6H_6 at Low Temperature
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概要
- 論文の詳細を見る
The hear capacity C_p of powdered specimen of Ni(NH_3)_2・Ni(CN)_4・2C_6H_6 has been measured between 1.3 and 10°K. A sharp λ-shaped anomaly for antiferromagnetic phase change has been found at 2.39±0.01°K. The total entropy change which was measured is 15.91(J/mol°K), but total magnetic ordering entropy is Rln (2S+1)=9.13(J/mol°K) with S=1 for ground state of nickel ion. The excess entropy is assumed t be due to the hindered rotations of NH_3 group. The low temperature asymptotic form for the heat capacity is C_p∝1/T^2e^<-Δ/T>, where the amount of magnetic elementary excitation energy Δ is 8.85°K.
- 社団法人日本物理学会の論文
- 1972-04-05
著者
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Watanabe Takashi
Department of Chemistry, Graduate School of Science, Kyoto University
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NAGATA Shoichi
Department of Materials Science and Engineering, Muroran Institute of Technology
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Nagata Shoichi
Department Of Physics Faculty Of Science Hokkaido University
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Nagata Shoichi
Department Of Applied Material Science Muroran Institute Of Technology
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MARUYAMAUCHI Tsuyoshi
Department of Physics, Faculty of Science Hokkaido University
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Maruyamauchi Tsuyoshi
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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