Micromagnetic simulation by using the fast multipole method specialized for uniform brick elements

Y. Takahashi*, S. Wakao, T. Iwashita, M. Kanazawa

*この研究の対応する著者

研究成果査読

5 被引用数 (Scopus)

抄録

This paper describes a large-scale micromagnetic simulation by using the fast multipole method (FMM) specialized for uniform brick elements. The fast Fourier transform (FFT) is widely used to reduce computational costs of the demagnetizing field calculation. However, the FFT still requires operation counts of O (N log N), where N is the number of elements, which results in the huge computational costs in large-scale problems. To overcome the difficulties, we develop an O (N) approach based on the FMM. In a micromagnetic simulation, an analyzed region is usually subdivided into uniform elements. By making the best use of the periodic structure of uniformly distributed elements, the computational costs of the FMM can be reduced drastically. A large-scale micromagnetic simulation of a single-pole-type head demonstrates the effectiveness of the specialized FMM from the viewpoints of calculation time and memory requirements, compared with the FFT.

本文言語English
論文番号07D514
ジャーナルJournal of Applied Physics
105
7
DOI
出版ステータスPublished - 2009 4 27

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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