Role of reversal incoherency in reducing switching field and switching field distribution of exchange coupled composite bit patterned media

被引：54

作者：

Hauet, T. ^{[1
]}

Dobisz, E. ^{[1
]}

Florez, S. ^{[1
]}

Park, J. ^{[1
]}

Lengsfield, B. ^{[1
]}

Terris, B. D. ^{[1
]}

Hellwig, O. ^{[1
]}

机构：

[1] Hitachi Global Storage Technol, San Jose Res Ctr, San Jose, CA 95135 USA

来源：

APPLIED PHYSICS LETTERS | 2009年 / 95卷 / 26期

关键词：

cobalt; coercive force; composite materials; exchange interactions (electron); magnetic multilayers; magnetic recording; magnetic switching; magnetisation reversal; nickel; palladium; remanence; thermal stability;

D O I：

10.1063/1.3276911

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Model exchange coupled composite media, namely [Co/Pd](5)/Pd(t)/[Co/Ni](3)/Co multilayers, deposited onto prepatterned substrates have been investigated for potential use in bit patterned recording. Optimizing the thickness of the Pd interlayer allows decreasing the switching field (H(C)) and switching field distribution (sigma(SFD)) while maintaining thermal stability. The dependence of the remanent coercivity on the external field angle indicates that the gain in H(C) and sigma(SFD) originates from the incoherent magnetization reversal introduced by slightly decoupling the hard and soft multilayer stacks. This tendency is confirmed by further reductions in H(C) and sigma(SFD), when inserting another Pd interlayer within the hard [Co/Pd](5) stack.

引用

页数：3

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