Magnetoresistance and exchange coupling in spin-valve films with Ni Mn superlattice

被引：2

作者：

Lee, SS ^{[1
]}

Hwang, DG

Park, CM

机构：

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

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

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1999年 / 198-99卷

基金：

新加坡国家研究基金会;

关键词：

superlattice; exchange coupling; thermal annealing; thermal stability; annealing cycle;

D O I：

10.1016/S0304-8853(98)00625-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The exchange coupling field (H(ex)) and the coercive field H(c) of thermally annealed NiMn-superlattice/NiFe/Cu/NiFe spin-valves are 220 and 110 Oe, respectively. However. the magnetoresistance ratio is small due to interdiffusion of NiFe and Cu. The thermal stability of samples with 100 Angstrom of the NiFe layer is better than those with 50 Angstrom or 70 Angstrom of NiFe. The samples were annealed at 300 degrees C for 2 h. The H(ex) and H(c) of [Ni(2.3 Angstrom)/Mn(2.7 Angstrom)](40)-superlattice/NiFe(100 Angstrom)/Cu(30 Angstrom)/NiFe(60 Angstrom) spin-valves increased gradually with the number of annealing cycles, and attained their maximum value for 20 cycles. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：70 / 72

页数：3

共 7 条

[1] High exchange anisotropy and high blocking temperature in strongly textured NiFe(111)/FeMn(111) films [J].