Enhanced blocking temperature in (Pt/Co)3/IrMn/Co and (Pd/Co)3/IrMn/Co trilayers with ultrathin IrMn layer

被引：12

作者：

Vinai, G. ^{[1
,2
,3
]}

Moritz, J. ^{[1
,2
]}

Bandiera, S. ^{[3
]}

Prejbeanu, I. L. ^{[1
,2
,3
]}

Dieny, B. ^{[1
,2
]}

机构：

[1] CEA Grenoble, UJF, CNRS, INP,SPINTEC, F-38054 Grenoble, France

[2] CEA Grenoble, INAC, F-38054 Grenoble, France

[3] Crocus Technol, F-38054 Grenoble, France

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2013年 / 46卷 / 32期

关键词：

EXCHANGE-BIAS; ANISOTROPY; FILMS; MODEL;

D O I：

10.1088/0022-3727/46/32/322001

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

IrMn blocking temperature (T-B) is compared between IrMn/Co bilayers and (Pt/Co)(3)/IrMn/Co and (Pd/Co)(3)/IrMn/Co trilayers for different IrMn thicknesses. Exchange bias field (H-ex) is measured from 5 to 400 K. Trilayers show a more concave thermal decrease of H-ex(T) compared to bilayers and, for thin IrMn layers, larger T-B and sharper peak of coercive field H-c around T-B. This H-ex(T) behaviour presents improved characteristics for thermally assisted-MRAM (TA-MRAM) applications, with large H-ex/H-c ratio. Two physical explanations are proposed: an indirect IrMn intergrain coupling through the (Pt(Pd)/Co)(3) layer and a reduction of IrMn/Co interfacial coupling due to out-of-plane canting of the IrMn spins.

引用

页数：7

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