Thermal effects in highly packed recording media
Journal
Journal of Magnetism and Magnetic Materials
Journal Volume
177
Pages
903-904
Date Issued
1998
Author(s)
Abstract
The dependence of coercivity on packing density in media composed of acicular particles is discussed. We conclude that the nonlinear dependence at small and the linear dependence at moderate packing densities is due to dipolar interactions between the particles; at higher packing densities the bulk magnetization reversal mechanism sets in. It is shown that both the range of linear packing density dependence and the transition to the bulk mode are determined by ambient temperature and driving field frequency. © 1998 Elsevier Science B.V. All rights reserved.
Type
journal article