Field-dependent anisotropic magnetoresistance and magnetization measurements of NiFe/FeMn exchange-biased bilayers
✍ Scribed by L.C.C.M. Nagamine; J.E. Schmidt; M.N. Baibich; E.B. Saitovitch; J. Geshev
- Publisher
- Elsevier Science
- Year
- 2006
- Tongue
- English
- Weight
- 133 KB
- Volume
- 384
- Category
- Article
- ISSN
- 0921-4526
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✦ Synopsis
The exchange-bias effect was investigated through the analyses of the magnetic hysteresis loops and anisotropic magnetoresistance measurements of NiFe/FeMn bilayers. The angular variations of the exchange-bias field and coercivity were fitted in the framework of a domain-wall formation model which assumes formation of a planar domain wall at the antiferromagnetic side of the interface. The anisotropy parameters of both layers were extracted from the fits and were also used to obtain the orientation of the NiFe magnetization for different magnetic field in-plane directions. The angular dependence of the anisotropic magnetoresistance was then calculated and a comparison with the experimental measurements was made. The agreement between these curves was good for magnetic field much higher than the exchange-bias field and only reasonable for magnetic field of the order of or lower than the exchange-bias field.