Magnetic Properties of Epitaxial 6 ML fcc-Fe/Cu(100) Films

MRS Online Proceedings Library volume 313, pages237–243(1993)Cite this article

Abstract

A study has been made of the magnetic properties of epitaxial 6 monolayer (ML) fcc-Fe films on Cu(100) with various thicknesses of epitaxial Cu deposited on top of the Fe. It was found that the magnetic properties undergo striking changes as a function of the Cu thickness. The easy axis of magnetization goes from being in-plane for the bare Fe to perpendicular upon the deposition of 1 ML Cu. Concurrently there is a dramatic decrease in the Kerr signal intensity at saturation. Upon depositing a second ML of Cu the Kerr signal intensity more than doubles, and the easy axis remains perpendicular. For Cu overlayers of 3 ML to 10 ML the Kerr signal intensity at saturation gradually diminishes to below the level of detectability, as if the Fe were nonmagnetic. A superlattice consisting of 60 ML Cu/(6 ML 57Fe/10 ML Cu)x5/Cu(100) was fabricated and studied at room temperature by conversion electron Mossbauer spectroscopy. The results confirmed that the Fe is indeed nonmagnetic. The four inner Fe layers of the 6 ML film have the same isomer shift as bulk fcc-Fe in precipitates in Cu, and the two boundary Fe layers exhibit an asymmetric quadrupole doublet.

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Affiliations

  1. National Institute of Standards and Technology, Gaithersburg, MD, 20899, USA

    L. J. Swartzendruber, L. H. Bennett, Μ. T. Kief & W. F. Egelhoff Jr.

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  1. L. J. Swartzendruber
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  2. L. H. Bennett
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  3. Μ. T. Kief
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  4. W. F. Egelhoff Jr.
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Correspondence to L. J. Swartzendruber.

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Swartzendruber, L.J., Bennett, L.H., Kief, Μ.T. et al. Magnetic Properties of Epitaxial 6 ML fcc-Fe/Cu(100) Films. MRS Online Proceedings Library 313, 237–243 (1993). https://doi.org/10.1557/PROC-313-237

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