Thermodynamic behavior of a nano-sized magnetic grain near the superparamagnetic limit
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概要
- 論文の詳細を見る
A combined theory of the micromagnetic and Monte Carlo simulations is established to analyze the thermal property of a nano-sized magnetic grain. The Langevin equation of a grain's magnetic moment is the Landau-Lifshitz equation augmented by a "random-field" term representing the thermal-agitated force. The angular distribution of the magnetic moment of the grain is studied via its time evolution process. The tunnelling of the magnetic moment vector between two energy minimum states is observed. A simple analytical expression is obtained for the simulated attempt frequency, which agrees well with the experiential value.
- 社団法人電子情報通信学会の論文
- 2002-10-31
著者
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WEI Dan
Data Storage Institute
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Wei D
Department Of Environmental Science And Engineering Environment Simulation And Pollution Control Sta
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Wei Dan
Lab Of Advanced Materials Department Of Materials Science And Engineering Tsinghua University
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Qin Jian
Lab of Advanced Materials, Dept. of Materials Science and Engineering, Tsinghua University
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Qin Jian
Lab Of Advanced Materials Dept. Of Materials Science And Engineering Tsinghua University
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