ISSN:
1572-9486
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract NiFe thin films have been deposited on monocrystalline CoO substrates cut out from a single crystal and carefully polished. A loop displacement and a large increase of the easy axis coercive force are found below the Néel temperature of the oxide. At the same time, the torque curves show residual rotational hysteresis in large applied fields, unidirectional anisotropy and an anomalous increase of the uniaxial anisotropy. The results do not depend on the orientation, (111) or (100), of the substrates, because of surface roughness. Unidirectional anisotropy and rotational hysteresis are due to exchange coupling at the interface between the two materials. The increase inK u andH c might result from strain effects or from ferro-antiferromagnetic exchange coupling.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01691540
