Enhancement of giant magnetoresistance properties of NiO spin valves with an oxidized free layer naturally in the air

被引：8

作者：

Kim, JK ^{[1
]}

Hwang, DG

Lee, SS

Joo, HW

Lee, KA

Park, CM

机构：

[1] Sangji Univ, Dept Comp & Elect Phys, Wonju 220702, South Korea

[2] Dankook Univ, Dept Phys, Cheonan 330714, South Korea

[3] Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2001年 / 89卷 / 11期

关键词：

D O I：

10.1063/1.1359222

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The effect of specular electron scattering on the natural oxidation of a free layer in NiO spin valves has been investigated. The magnetoresistance ratio and the exchange biasing field (H-ex) of NiO(600 Angstrom)/Ni81Fe19(50 Angstrom)/Co(7 Angstrom)/Cu(20 Angstrom)/Ni81Fe19(70 Angstrom) spin valves were increased from 4.9% to 7.3%, and 110 to 170 Oe after the natural oxidation in the atmosphere for 80 days, respectively. The sheet resistance rho decreased from 28 to 17 mu Ohm m, but Delta rho did almost not change after the oxidation. The spin valves enhanced by the specular electron scattering in the naturally oxidized Co/NiFe/NiFeOx free layer were confirmed from the depth profiles using Auger electron spectroscopy. (C) 2001 American Institute of Physics.

引用

页码：6946 / 6948

页数：3

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