Improved corrosion resistance of IrMn by Cr and Ru additions

被引：11

作者：

Carey, MJ ^{[1
]}

Kellock, A ^{[1
]}

Baril, L ^{[1
]}

Childress, JR ^{[1
]}

Le, T ^{[1
]}

Thompson, T ^{[1
]}

Gurney, BA ^{[1
]}

机构：

[1] IBM Corp, Almaden Res Ctr, Recording Head & Nanostruct Mat Grp, San Jose, CA 95120 USA

来源：

APPLIED PHYSICS LETTERS | 2002年 / 81卷 / 27期

关键词：

D O I：

10.1063/1.1526910

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The magnetic and corrosion properties of Ir16Mn84 with Ru and Cr additions have been studied. Spin valves With Ir16Mn84-Ru have slightly lower H-ex and T-b than when Pure Ir16Mn84 is used. The corrosion, properties improve, H-ex and T-b improve with 3 vol % Cr, but drop considerably with more Cr additions, losing 21 % of the pure IrMn value by 12 vol % Cr. The corrosion current and potential are I-c = 8 muA/cm(2) and E-0 = -580 mV respectively, for Ir16Mn84 with 12 vol % Cr. This represents a significant improvement over pure Ir16Mn84, which has I-c = 100 muA/cm(2) and E-0 = -1300 mV. When Ru is used as the additive, I-c and E-0 are 10 muA/cm(2) and -100 mV, respectively, for 9 vol %. Cr is the superior additive, especially in small concentrations where it shows a significant decrease in the I, without degrading the magnetic properties. 0 2002 American Institute of Physics. [DOI: 10.1063/1.1526910].

引用

页码：5198 / 5200

页数：3

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