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Phys. Rev. B 53, 5112–5115 (1996)

[Issue 9 – 1 March 1996 ]

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Temperature-dependent biquadratic coupling in antiferromagnetically coupled Fe/FeSi multilayers

Eric E. Fullerton and S. D. Bader

Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439

Fe/FeSi multilayers are known to exhibit a strong antiferromagnetic interlayer coupling peak centered at a nominal FeSi spacer thickness of ~15±2 Å at room temperature, and to develop remanence in the magnetic hysteresis loop upon cooling to ~100 K. An analysis of the hysteresis loops is found to require the inclusion of a temperature-dependent biquadratic (90° coupling) in addition to the bilinear coupling term in the energetics. The temperature dependence of the Fe/FeSi multilayer coupling can then be understood in terms that are applicable to conventional metallic multilayer systems such as Fe/Cr.

©1996 The American Physical Society

URL: http://link.aps.org/abstract/PRB/v53/p5112
DOI: 10.1103/PhysRevB.53.5112

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