Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1803106 | Journal of Magnetism and Magnetic Materials | 2008 | 4 Pages |
Abstract
A Landau-Lifshitz-Gilbert (LLG) micromagnetic analysis of the recording field of single-pole-type (SPT) heads was carried out. The whole volume comprising the SPT head and the double-layered medium was treated micromagnetically using the finite-difference method with cubic cells as small as 5Â nm, giving a total number of cells of more than 10.8 million. A parallelized fast Fourier transform (FFT) method was used to solve this large-scale problem. Dynamic recording fields were calculated for various head structures and head materials. The timing (synchronization) between the dynamic head field and land location in bit-patterned media (BPM) is discussed and the design methodology is discussed for a fast-switching SPT head.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Y. Kanai, M. Saiki, K. Hirasawa, T. Tsukamoto, K. Yoshida, S.J. Greaves, H. Muraoka,