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High exchange coupling field and thermal stability of ferromagnetic IrMn-pinned spin valve films
- Authors
- Hwang J.Y.; Kim M.Y.; Rhee J.R.; Lee S.S.; Hwang D.G.; Yu S.C.
- Issue Date
- Apr-2002
- Publisher
- Institute of Electrical and Electronics Engineers Inc.
- Citation
- INTERMAG Europe 2002 - IEEE International Magnetics Conference
- Journal Title
- INTERMAG Europe 2002 - IEEE International Magnetics Conference
- Abstract
- Various antiferromagnetic (AFM) materials have been investigated in order to obtain higher thermal stability and reliability of the pinned layer for use in spin valve (SV) giant magnetoresistance (GMR) heads in high density magnetic recording. We have found that AFM Ir22Mn78 alloy films exchange coupled to Co75Fe25 films showed a large exchange coupling field (Hex) of 1,180 Oe and succeeded in developing GMR/SV, which is suitable for narrow gap head structure. In this paper, the MR properties and exchange coupling in bottom-type IrMn based SV films with high thermal stability were investigated. ©2002 IEEE.
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