A Theory of Antiferromagnetism

スポンサーリンク

概要

• 論文の詳細を見る

• A theory of antiferromagnet based on Heisenberg model is developed by a method which is much more directly the analogue of the original Bethe method than Weiss-Li's. By the present method, the calculations can be carried out over all temperatures. Especially, the situation at lower temperatures which is obscure in Weiss-Li's papers is made clear. Thus we can see that an anti-Curie point which Anderson has proposed, does not occur, if we calculate the density matrix of a cluster exactly without the perturbation method. By considering only a small cluster, being characteristic of the Bethe approximation, the long wavelength spin waves, which are important at lower temperatures, are excluded, so that the magnetization of the sublattice is completely saturated at 0°K in just the same way as in the Ising model. It is shown that, in the Bethe approximation, Curie point of antiferromagnet is higher than that of ferromagnet, for the same magnitude of |J|.

• 理論物理学刊行会の論文

著者

• Oguchi Takehiko

  Tokyo Institute Of Polytechnics

• Obata Yukio

  Department Of Physics Faculty Of Science University Of Tokyo

• Obata Yukio

  Department Of Physics Tokyo University

• OBATA Yukio

  Department of Physics, Tokyo University

• Obata Yukio

  Department of Information Science, Kanagawa University

関連論文

• Tentative Explanation of the Hysteresis Loops of Rochelle Salt
• Theory of the Transition in KH_2PO_4
• A New Type of Argument for the Existence of an Exact Dimer Ground State in S=1/2 Quantum Heisenberg Spin Systems
• Note on the Paramagnetic Susceptibility and the Gyromagnetic Ratio in Metals
• Note on the Electron Spin Resonance of the V_1-center : Calculation of the Electronic g-value
• PASER and Meson-Catalyzed Fusion
• Spin Quenching and Magnetic Resonance
• Diamagnetic Screening of Transverse Current Correlations and Neutron Scattering in Metals
• A Theory of Antiferromagnetism
• The Critical Exponent v along the Ferromagnetic-Nonferromagnetic Phase Boundary in the Two-Dimensional ±-J Ising Model
• Dimer State in Quantum Spin Systems
• Second Quantization Operators for Spin Operators
• Statistics of the Three-Dimensional Ferromagnet (III).
• Statistics of the Three-Dimensional Ferromagnet (II).
• Statistics of the Three-Dimensional Ferromagnet (I)
• Statistical Theory of Rotational Phase Transition, I

もっと見る 閉じる

スポンサーリンク