Magnetic anisotropy of epitaxial Fe films grown on curved W(001) with a graded step density
- Department of Physics, University of California at Berkeley, Berkeley, California 94720 (United States)
- Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
Ultrathin Fe films were grown epitaxially onto a stepped W(001) substrate, polished with a curvature to provide a continuously variable step density, with the steps parallel to the [100] crystalline axis. The steps induce an in-plane uniaxial magnetic anisotropy with easy axis perpendicular to the step edges. We found that this step-induced magnetic anisotropy does not enhance the Curie temperature of the Fe film. The strength of the anisotropy varies quadratically with step density, but does not decay with 1/d dependence expected for a surface-type anisotropy. We suggest that strain at the step edges might underlie the result. {copyright} {ital 1998} {ital The American Physical Society}
- OSTI ID:
- 614986
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 20 Vol. 57; ISSN 0163-1829; ISSN PRBMDO
- Country of Publication:
- United States
- Language:
- English
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