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“Magnetic Exchange Interactions in Fe/TbFe Bilayers”

Published online by Cambridge University Press:  25 February 2011

E. E. Marinero ,
G. S. Sprokel  and
H. Notarys
E. E. Marinero
Affiliation:
IBM Almaden Research Center, 650 Harry Road, San Jose, Ca. 95120-6099.
G. S. Sprokel
Affiliation:
IBM Almaden Research Center, 650 Harry Road, San Jose, Ca. 95120-6099.
H. Notarys
Affiliation:
IBM Almaden Research Center, 650 Harry Road, San Jose, Ca. 95120-6099.
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Abstract

We report on magnetic exchange coupling phenomena between Fe and TbFe thin films. The structures are grown utilizing D.C. magnetron sputtering from separate Tb and Fe targets and their magnetic characteristics are measured utilizing VSM and Longitudinal Kerr Rotation. In addition, Auger depth profiling and x-ray diffraction studies were conducted to study film composition and structure.

Uniaxial alignment of the Fe moment in the plane of the substrate is revealed by the longitudinal Kerr measurements. The coercivity of the Fe layer varies from 19 Oe to 130 Oe depending on the azimuthal angle between the normal to the plane of the bilayer and the direction of the external field. The hysterisis loops vary in shape from rectangular in the alignment direction to S-shape in the direction orthogonal to this direction.

These effects are discussed in terms of magnetic exchange coupling interactions between the ferromagnetic layer and the ferrimagnetic alloy.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 103 , 1987 , 245
Copyright
Copyright © Materials Research Society 1988

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References

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