| Presentation | 2002/10/31 Thermodynamic behavior of a nano-sized magnetic grain near the superparamagnetic limit Jian Qin, Dan Wei, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | 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. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | thermal fluctuation / magnetization reversal / Langevin equation |
| Paper # | MR 2002-43 |
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| Conference Information | |
| Committee | MR |
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| Conference Date | 2002/10/31(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Magnetic Recording (MR) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Thermodynamic behavior of a nano-sized magnetic grain near the superparamagnetic limit |
| Sub Title (in English) | |
| Keyword(1) | thermal fluctuation |
| Keyword(2) | magnetization reversal |
| Keyword(3) | Langevin equation |
| 1st Author's Name | Jian Qin |
| 1st Author's Affiliation | Lab of Advanced Materials, Dept. of Materials Science and Engineering, Tsinghua University() |
| 2nd Author's Name | Dan Wei |
| 2nd Author's Affiliation | Lab of Advanced Materials, Dept. of Materials Science and Engineering, Tsinghua University |
| Date | 2002/10/31 |
| Paper # | MR 2002-43 |
| Volume (vol) | vol.102 |
| Number (no) | 423 |
| Page | pp.pp.- |
| #Pages | 4 |
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