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Temperature Dependence of Two-Dimensional Spin Anisotropies

Published online by Cambridge University Press:  03 September 2012

Roy Richter  and
Jack G. Gay
Roy Richter
Affiliation:
Physics Department, General Motors Research Laboratories, Warren, MI 48090–9055
Jack G. Gay
Affiliation:
Physics Department, General Motors Research Laboratories, Warren, MI 48090–9055
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Abstract

Large anisotropy energy is an essential property of high quality permanent magnets. In previous work we have calculated the spin polarized electronic structure and anisotropy of monolayers and slabs of Fe, Ni, and V. In this work we calculate the dependence on temperature of the spin anisotropy of a ferromagnetic monolayer of Fe. We find the easy direction of magnetization is not sensitive to the temperature; the variations calculated here are likely too small to be observed. It is perpendicular to the plane of the surface for both low and high temperatures. The calculations become progressively more ill-behaved as the temperatures are lowered and require more computer time for satisfactory convergence.

For Fe/Cu {100}, we find the spins always prefer to point out of plane. Experimental results in general are consistent with this view, although the systems seem to be difficult to prepare.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 151: Symposium G – Growth, Characterization and Properties of Ultrathin Magnetic Films and Multilayers , 1989 , 3
Copyright
Copyright © Materials Research Society 1989

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References

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