Monte Carlo simulation of the reorientation transition in Heisenberg model with dipole interactions |
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Authors: | Liu Ying Chen Nanxian Zhao Hongmin Wei Chengwen |
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Institution: | a Institute of Applied Physics, University of Science and Technology Beijing, Beijing 100083, People's Republic of China b Department of Physics, Hebei Normal University, Shijiazhuang 050016, People's Republic of China c Department of Physics, Tsinghua University, Beijing 100084, People's Republic of China d School of Science, Tianjin University, Tianjin 300072, People's Republic of China |
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Abstract: | The change of magnetic states in ultrathin films with temperature have been simulated by Monte Carlo method. A Heisenberg model with long-range dipole interactions was adopted in our calculations. The results were qualitatively in good agreement with the experimental phenomena. That is at low temperatures the magnetization is perpendicular to the plane, and at higher temperatures but below the Curie point, the magnetization is mostly within the plane. In between these two regions, the magnetization seems to be suppressed. The simulations show that the loss of magnetization is a consequence of the special magnetic states in which the local domains orientations are reverse with the neighbor ones. |
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Keywords: | 75 70 Ak 75 70 Kw 75 40 Mg 05 70 Fh |
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