Multilayer exchange spring media for magnetic recording

被引：196

作者：

Suess, D. ^{[1
]}

机构：

[1] Vienna Univ Technol, Inst Solid State Phys, A-1040 Vienna, Austria

来源：

APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 11期

关键词：

D O I：

10.1063/1.2347894

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The concept of exchange spring media is extended from two layers to N layers. The coercive field of the multilayer structure decreases with 1/N while the energy barrier is only determined by the magnetic properties of the hardest layer. A 25 nm thick trilayer has a 7.5 times smaller coercive field (1.4 T) as a single layer at the same thermal stability and for the same value of the magnetization. A continuous variation of the anisotropy in the recording media reduces the coercive field by a factor of 10 for a layer thickness of 25 nm. (c) 2006 American Institute of Physics.

引用

页数：3

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