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Temperature effect on anisotropies in (001) Co-NiMn thin films
- Source :
- IEEE Transactions on Magnetics. Sept, 2002, Vol. 38 Issue 5, p2658, 3 p.
- Publication Year :
- 2002
-
Abstract
- We have studied the temperature effect on magnetic properties in (001) epitaxial Co-NiMn. The interfacial exchange coupling in Co-NiMn not only induces a unidirectional anisotropy but also a uniaxial anisotropy. Double shifted hysteresis loops could be found along the hard axis, and used to accurately determine the anisotropy constants using the coherent rotation model. The cubic anisotropy of Co decreases monotonically with increasing temperature, while the interface-induced uniaxial anisotropy decreases with increasing temperature up to 180[degrees]C, and then increases with further increasing temperature. A mechanism explaining the enhancement of interface-induced uniaxial anisotropy and coercivity at temperatures above 180[degrees]C is proposed. Index Terms--Anisotropies, coercivity, double shifted hysteresis loop, induced uniaxial anisotropy, thin film, vibrating sample magnetometer, (001) epitaxial Co-NiMn.
Details
- ISSN :
- 00189464
- Volume :
- 38
- Issue :
- 5
- Database :
- Gale General OneFile
- Journal :
- IEEE Transactions on Magnetics
- Publication Type :
- Academic Journal
- Accession number :
- edsgcl.94130648