Oscillatory biquadratic coupling in Fe/Cr/Fe(001)

A. J. R. Ives, J. A. C. Bland, R. J. Hicken, and C. Daboo
Phys. Rev. B 55, 12428 – Published 1 May 1997
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Abstract

Polar Kerr measurements have been used to measure the dependence of the biquadratic coupling strength B12 on Cr thickness in an Fe/Cr/Fe trilayer. The overall behavior, which consists of a maximum coupling strength at dCr=5 Å (3.5 ML) with a falloff at greater Cr thicknesses, is found to be consistent with in-plane Kerr and Brillouin light-scattering measurements performed on the same sample. The polar Kerr measurements suggest additionally that B12 increases from zero near zero Cr thickness, and that it oscillates in magnitude after the first peak, with a second peak in B12 occurring at about dCr=12 Å (8.3 ML). The positions and heights of the first and second biquadratic coupling maxima, in relation to the first bilinear coupling maximum, show excellent agreement with previous measurements by Köbler et al. of the biquadratic coupling behavior in Fe/Cr/Fe, and also show good agreement with the predictions of an intrinsic biquadratic coupling mechanism due to Edwards et al.

    DOI:https://doi.org/10.1103/PhysRevB.55.12428

    ©1997 American Physical Society

    Authors & Affiliations

    A. J. R. Ives, J. A. C. Bland, R. J. Hicken, and C. Daboo

    • Cavendish Laboratory, University of Cambridge, Madingley Road, Cambridge CB3 0HE, United Kingdom

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    Issue

    Vol. 55, Iss. 18 — 1 May 1997

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