Phase Transition between the Spin-Flop and Paramagnetic Phases of the Heisenberg Antiferromagnet

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概要

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• The spin-flol> paramagnetic phase transition of the Heisenberg antiferromagnet in the limit of zero anisotropy is studied by a Green function theory in'the randoril phase approximation for S= 1/2 and by a spin wave theory inc,luding spin wave interactions for general spin. The phase transition is found to be of first order at finite temperature and the angle O between the spins and the direction of applied field changes discontinuously at the transition. The spin wave theory predicts a non-zero excitation energy gap in the limit of zero anisotropy in the spin-flop phase.

• 社団法人日本物理学会の論文
• 1981-10-15

著者

• Muramatsu Koji

  Department Of Materials Processing Faculty Of Engineering Tohoku University

• Muramatsu Koji

  Department Of Physics Tokyo Institute Of Technology

関連論文

• Determination of Distribution Patterns of Fillers in Composites by Micromorphological Parameters
• Phase Transition between the Spin-Flop and Paramagnetic Phases of the Heisenberg Antiferromagnet
• An Improved Cluster Approximation for Antiferromagnet

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