Ising Ferromagnets with Random Impurities

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概要

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• The Ising of spin 1/2 with the nearest-neighbor interaction, in which nonmagnetic impurity atoms are dissolved, is investigated. Based on the identity <s_i>=<tanh(KΣs_j)>, decoupling approximation is introduced for treating the many-spin correlation functions. The dependences of the critical temperature and of the spontaneous magnetization on the impurity concentration are calculated for two- and three-dimensional lattices. The results for the critical temperature and the critical concentration are better than the results of the results of the extended molecular-field approximations of Mamada and Takano, or of Oguchi and Obokata. Especially for the three-dimensional lattices the critical obtained agrees with that of Sykes and Essam, estrmated from the series expansion.

• 社団法人日本物理学会の論文
• 1973-12-05

著者

• Matsudaira Noboru

  Physical Science Laboratories Nihon University

関連論文

• Ising Ferromagnets with Random Impurities
• The Effect of Lattice Vibration on the Phase Transition of the Ising Model
• Inelastic Scattering of X-Rays by Light Metals
• An Ising Ferromagnet with Dilute Impurities

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