Irreversible and reversible measurements off exchange anisotropy

被引：65

作者：

Xi, HW ^{[1
]}

White, RM

Rezende, SM

机构：

[1] Carnegie Mellon Univ, Ctr Data Storage Syst, Pittsburgh, PA 15213 USA

[2] Univ Fed Pernambuco, Dept Fis, BR-50670901 Recife, PE, Brazil

来源：

PHYSICAL REVIEW B | 1999年 / 60卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.60.14837

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Recently, several different experimental techniques have been used to measure the unidirectional exchange coupling, or exchange anisotropy, in ferromagnetic/antiferromagnetic bilayers. In particular, it has been found that reversible ac susceptibility measurements show significantly larger exchange anisotropy than the conventional irreversible hysteresis loop measurements. We have theoretically investigated the irreversible and reversible measurements of exchange anisotropy and our analysis shows that when the magnetic degrees of freedom of the antiferromagnet are taken into account, different measurement techniques may indeed give different results for the exchange coupling. [S0163-1829(99)02545-X].

引用

页码：14837 / 14840

页数：4

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