Composition-driven spin-reorientation transition in ferromagnetic alloy films

A spin-reorientation transition upon a variation of the Fe concentration x is observed in ultrathin fcc FexCo1−x alloy films on Cu(001) for x>77%. For film thicknesses below 4 monolayers the magnetic easy axis changes from in-plane on the Co-rich side to out-of-plane on the Fe-rich side. Since no...

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Main Authors: Dittschar, Armin (Author) , Zharnikov, Michael (Author) , Kuch, W. (Author) , Lin, M.-T. (Author) , Schneider, C.M. (Author) , Kirschner, J. (Author)
Format: Article (Journal)
Language:English
Published: 1998
In: Physical review. B, Condensed matter and materials physics
Year: 1998, Volume: 57, Issue: 6, Pages: R3209-R3212
ISSN:1550-235X
DOI:10.1103/PhysRevB.57.R3209
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevB.57.R3209
Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevB.57.R3209
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Author Notes:A. Dittschar, M. Zharnikov, W. Kuch, M.-T. Lin, C.M. Schneider, and J. Kirschner

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520 |a A spin-reorientation transition upon a variation of the Fe concentration x is observed in ultrathin fcc FexCo1−x alloy films on Cu(001) for x>77%. For film thicknesses below 4 monolayers the magnetic easy axis changes from in-plane on the Co-rich side to out-of-plane on the Fe-rich side. Since no structural transitions accompany this spin-reorientation transition, varying the alloy composition can be interpreted as varying the number of 3d electrons. Upon changing the average d-band filling by as little as 0.1 electron strong changes of the anisotropy energy are observed. 
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