Landau–Lifshitz–Gilbert Micromagnetic Analysis of Single-Pole-Type Write Head for Perpendicular Magnetic Recording Using Full-FFT Program on PC Cluster System

Author

Kanai, Yasushi ; Saiki, Masahiko ; Hirasawa, Kazunori ; Tsukamomo, Toshio ; Yoshida, Kazuetsu

Author_Institution

Dept. of Inf. & Electron. Eng., Niigata Inst. of Technol., Kashiwazaki

Volume

44

Issue

6

fYear

2008

fDate

6/1/2008 12:00:00 AM

Firstpage

1602

Lastpage

1605

Abstract

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.

Keywords

fast Fourier transforms; magnetic recording; micromagnetics; Landau-Lifshitz-Gilbert micromagnetic analysis; fast Fourier transform algorithm; finite-element method; message passing interface; perpendicular magnetic recording; single-pole-type write head; LLG equation; PC cluster system; micromagnetic simulation; parallel computing; perpendicular magnetic recording; single-pole-type head;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2007.916254

Filename

4526909