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- Sato T.
- Department of Computer Science, Univ. of Electro-Communications
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- Nakatani Y.
- Department of Computer Science, Univ. of Electro-Communications
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抄録
Micromagnetic simulation has been used to calculate magnetization distribution and dynamics in nanoscale magnetic materials. A method reducing the calculation time is needed because it requires prolonged periods for calculation. We propose a method of calculation to reduce the calculation time with a graphics processing unit (GPU). The speed with the proposed method is fifteen times faster than that with the conventional one with a CPU at maximum. Because a GPU has very fast single precision calculation units and relatively slow double precision calculation units, it is necessary to use single precision units for fast calculation with a GPU. The difference between the results of one calculation with single and double precision units is very small. However, this difference accumulates in simulations. There is a possibility the results may change due to this difference. This effect is investigated with static and dynamic simulations with a vortex structure in a nanodot. The relative differences in static and dynamic calculations are 10-6 and 0.04, respectively. These differences are sufficiently small for practical simulations. Therefore, a method with a GPU is useful to obtain micromagnetic simulations of vortex core motion.
収録刊行物
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- Journal of the Magnetics Society of Japan
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Journal of the Magnetics Society of Japan 35 (3), 163-170, 2011
公益社団法人 日本磁気学会
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詳細情報 詳細情報について
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- CRID
- 1390001205285537024
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- NII論文ID
- 130000676997
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- NII書誌ID
- AA12297999
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- ISSN
- 18822932
- 18822924
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- NDL書誌ID
- 11104838
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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- 抄録ライセンスフラグ
- 使用不可