Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1802634 | Journal of Magnetism and Magnetic Materials | 2006 | 5 Pages |
Abstract
A three-dimensional micromagnetic model with non-uniform grain size distribution has been built up to study the magnetization process in FePt L10 perpendicular media. A 3D model of a single FePt magnetic grain is also set up for comparison. The high magneto-crystalline anisotropy Ku results in a short exchange length lex in FePt nanograins. Therefore a magnetic grain is divided into smaller grids on the order of lex. The simulated perpendicular and longitudinal loops are consistent with experiments, and it is explained why the measured perpendicular Hc is relatively smaller compared with the saturation field of the longitudinal loop in the FePt perpendicular medium.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Kun Piao, Dingjun Li, Dan Wei,