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Structural and Magnetic Properties of Epitaxial Co-Au Superlattices

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Abstract

We describe measurements on the structural and magnetic properties of Co–Au superlattices grown on Ge–buffered (110) GaAs by molecular beam epitaxy. Samples have been prepared with Co layer thicknesses ranging from 5–40Å and Au spacer layers of constant thickness, ∼ 16Å. X–ray scattering and high-resolution transmission electron microscopy show that the hcp Co layers grow epitaxially with the (0001) axis parallel to (111)Au and with the in–plane Co[1120] axis parallel to GaAs[001]. SQUID magnetometer measurements reveal a crossover in the magnetic anisotropy of the as–grown samples such that the easy axis is perpendicular to the substrate plane when the Co layer thickness is less than ∼19Å.

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Authors and Affiliations

  1. Department of Physics, The University of Michigan, 48109, Ann Arbor, MI, USA

    C. H. Lee, Hui He, F. Lamelas, W. Vavra, C. Uher & Roy Clarke

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  1. C. H. Lee
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  2. Hui He
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  3. F. Lamelas
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  4. W. Vavra
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  5. C. Uher
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  6. Roy Clarke
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Lee, C.H., He, H., Lamelas, F. et al. Structural and Magnetic Properties of Epitaxial Co-Au Superlattices. MRS Online Proceedings Library 151, 111–116 (1989). https://doi.org/10.1557/PROC-151-111

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  • DOI: https://doi.org/10.1557/PROC-151-111

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