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Magnetoresistance of antiferromagnet CoFe/Ru/CoFe/IrMn top spin valve with thermal stability
- Issue Date
- May-2004
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- synthetic antiferromagnet; MR ratio; effective exchange coupling field (H-eex); annealing cycle; saturation field (H-s)
- Citation
- JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, v.272, pp.1875 - 1876
- Journal Title
- JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
- Volume
- 272
- Start Page
- 1875
- End Page
- 1876
- ISSN
- 0304-8853
- Abstract
- Thermal stability and magnetoresistive properties of synthetic antiferromagnet spin valves (SAF/SV) having the Ta20/NiFe20/CoFe20/Cu22/CoFe25/Ru5/CoFe22/IrMn40/Ta20 (in Angstrom) structure were investigated. The SAF/SV annealed for a 1 h at 200degreesC exhibits a magnetoresistance (MR) ratio of 8.8%, an effective exchange coupling field (H-eex) of 1170 Oe, and an antiferromagnetic (AF) saturation field (H-s) of 5200 Oe at room temperature. H-eex varies in approximately a 1/t(AP2) (t(AP2) is the thickness of CoFe layer adjacent to antiferromagnet layer). H-eex and MR ratio are stabilized after the first annealing cycle, and it is thought that this SAF/SV reveals higher thermal stability. (C) 2004 Elsevier B.V. All rights reserved.
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