Phase Transition in Ni_xCd_<(1-x)>(NH_3)_2・Ni(CN)_4・2C_6H_6
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概要
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The magnetic phase transition in the antiferromagnetic Ising spin system diluted with non-magnetic atoms, Ni_xCd_<(1-x)>(NH_3)_2・Ni(CN)_4・2C_6H_6, was studied by the specific heat measurement. The dependence of the Neel point T_N(x) on concentration x for Ni^<2+> ions was obtained. The critical concentration x_c, below which magnetic order did not exist, was 0.65. Broad maximum of the Schottky-type due to short range order was observed and the curve of specific heat at x_c=0.65 was well fitted to the exact solution of the Ising linear chain model suggesting that the effective dimensionality of spin system was decreased by random dilution. The singular point of specific heat was reduced to a cusp by the effect of dilution.
- 社団法人日本物理学会の論文
- 1974-09-15
著者
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NAGATA Shoichi
Department of Materials Science and Engineering, Muroran Institute of Technology
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Nagata Shoichi
Department Of Applied Material Science Muroran Institute Of Technology
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Nagata Shoich
Department of Physics, Faculty of Science, Hokkaido University
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