Thermodynamic Properties of the One-Dimensional Ising System (CH_3)_4NCo(NO_2)_3, the Iso-Structural Compound with the Haldane System, TMNIN
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概要
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We measured the magnetic heat capacity, susceptibility and magnetization of (CH_3)_4NCo(NO_2)_3(TMCON) which is the iso-structural compound with the Haldane compound (CH_3)_4NNi(NO_2)_3(TMNIN). From the analysis of these thermodynamic properties, we found that TMCON is a one-dimensional S=1/2 Ising system where the ferromagnetic nearest neighbor interaction J_1 and the antiferromagnetic next-nearest neighbor interaction J_2 are competing. The value of J_1 is estimated to be J_1/k_B=28.0±4.0K. It is confirmed that the results can be comprehensively explained only when we take J_2<0, although J_2=-0.22J_1 estimated from the thermal analysis differs from J_2=-0.46J_1 from the magnetic susceptibility for the powdered sample. Based on the results for TMCON, we discuss the stabilization of the Haldane state in TMNIN, considering the frustration effect between J_1 and J_2.
- 社団法人日本物理学会の論文
- 1995-11-15
著者
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KAWAE Tatsuya
Department of Applied Quantum Physics, Kyushu University
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TAKEDA Kazuyoshi
Department of Applied Quantum Physics, Kyushu University
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Ito Masakazu
Department of Applied Science, Faculty of Engineering, Kyushu University
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Deguchi Hiroyuki
Department of Applied Science, Faculty of Engineering, Kyushu University
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MITO Masaki
Department of Electronics, Faculty of Engineering, Kyushu Institute of Technology
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TAKAGI Seishi
Department of Electronics, Faculty of Engineering, Kyushu Institute of Technology
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Masakazu Ito
Department Of Quantum Matter Adsm Hiroshima University
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Takagi Seishi
Department Of Electrical Engineering Faculty Of Engineering Osaka University:department Of Electrica
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Deguchi Hiroyuki
Department Of Applied Science Faculty Of Engineering Kyushu University
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Kawae Tatsuya
Department Of Applied Quantum Physics Kyushu University
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Hitaka Masako
Department of Applied Science,Faculty of Engineering,Kyushu University
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Masako Hitaka
Department Of Physics Faculty Of Science And Engineering Saga University
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Ito Masakazu
Department Of Applied Science Faculty Of Engineering Kyushu University
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Takeda Kazuyoshi
Department Of Applied Quantum Physics Faculty Of Engineering Kyushu University:institute Of Environm
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Hitaka Masako
Department of Applied Science, Faculty of Engineering, Kyushu University
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