Micromagnetic Studies of Finite Temperature M-H Loops for FePt-C Media
We have recently developed a new micromagnetie method at finite temperature, where the Hybrid Monte Carlo method is employed to realize the Boltzmann distribution with respect to the magnetic free energy. Hence, the hysteresis loops and domain structures at arbitrary temperature below the Curie poin...
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| Published in | Chinese physics letters Vol. 34; no. 2; pp. 100 - 103 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
01.02.2017
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| Online Access | Get full text |
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| Summary: | We have recently developed a new micromagnetie method at finite temperature, where the Hybrid Monte Carlo method is employed to realize the Boltzmann distribution with respect to the magnetic free energy. Hence, the hysteresis loops and domain structures at arbitrary temperature below the Curie point Tc can be simulated. The Haxnilton equations are used to find the magnetization distributions instead of the Landau-Lifshitz （LL） equations. In our previous work, we applied this method on a simple uniaxial anisotropy nano-paxticle and compared it with the mieromagnetic method using LL equations. In this work, we use this new method to simulate an LIO FePt-C granular thin film at finite temperatures. The polycrystalline Voronoi microstructure is included in the model, and the effects of the misorientation of FePt grains are also simulated. |
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| Bibliography: | 11-1959/O4 Long-Ze Wang1, Jing-Yue Miao1, Zhen Zhao1, Chuan Liu2, Dan Wei（1.School of Materials Science and Engineering, Tsinghua University, Beijing 100084; 2.School of Physics, Peking University, Beijing 100871） We have recently developed a new micromagnetie method at finite temperature, where the Hybrid Monte Carlo method is employed to realize the Boltzmann distribution with respect to the magnetic free energy. Hence, the hysteresis loops and domain structures at arbitrary temperature below the Curie point Tc can be simulated. The Haxnilton equations are used to find the magnetization distributions instead of the Landau-Lifshitz （LL） equations. In our previous work, we applied this method on a simple uniaxial anisotropy nano-paxticle and compared it with the mieromagnetic method using LL equations. In this work, we use this new method to simulate an LIO FePt-C granular thin film at finite temperatures. The polycrystalline Voronoi microstructure is included in the model, and the effects of the misorientation of FePt grains are also simulated. |
| ISSN: | 0256-307X 1741-3540 |
| DOI: | 10.1088/0256-307X/34/2/027501 |