Landau–Lifshitz–Gilbert Micromagnetic Analysis of Single-Pole-Type Write Head for Perpendicular Magnetic Recording Using Full-FFT Program on PC Cluster System
Landau–Lifshitz–Gilbert Micromagnetic Analysis of Single-Pole-Type Write Head for Perpendicular Magnetic Recording Using Full-FFT Program on PC Cluster System
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DOI：
10.1109/tmag.2007.916254
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发表时间：
2008-05
影响因子：
2.1
通讯作者：
Y. Kanai;M. Saiki;K. Hirasawa;T. Tsukamomo;K. Yoshida
中科院分区：
文献类型：
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作者：
Y. Kanai;M. Saiki;K. Hirasawa;T. Tsukamomo;K. Yoshida
本文研究了在微机机群上用并行程序进行Landau-Lifshitz-吉尔伯特（LLG）微磁分析。在分析中，使用LLG方程对整个磁性材料进行微磁处理。快速傅里叶变换（FFT）算法被纳入头部区域除了介质区域推导出退磁场和程序是并行使用的消息传递接口（MPI）。在单64位处理器系统上，用8个CPU组成的PC集群系统的计算速度比我们原来的程序快4800倍。推导了单极型准静态场分布，并与有限元法进行了比较，验证了其准确性。最后，动态响应推导出各种头部结构和材料。
A Landau-Lifshitz-Gilbert (LLG) micromagnetic analysis using a parallelized program on a PC cluster is investigated. In the analysis, the whole magnetic material is treated micromagnetically using the LLG equation. The fast Fourier transform (FFT) algorithm is incorporated in the head region in addition to the medium region to derive the demagnetization field and the program is parallelized using the message passing interface (MPI). The PC cluster system with 8 CPU has achieved a calculation speed 4800 times faster than our original program on a single 64-bit processor system. Quasi-static field distributions for a single-pole type (SPT) are derived and the accuracy is validated by comparison with the finite-element method (FEM). Finally, dynamic responses are derived for various head structures and materials.