Interface induced uniaxial magnetic anisotropy in amorphous CoFeB films on AlGaAs(001)

Hindmarch, A.T., Kinane, C.J., MacKenzie, M., Chapman, J.N., Henini, M., Taylor, D., Arena, D.A., Dvorak, J., Hickey, B.J. and Marrows, C.H. (2008) Interface induced uniaxial magnetic anisotropy in amorphous CoFeB films on AlGaAs(001). Physical Review Letters, 100(11), p. 117201. (doi:10.1103/PhysRevLett.100.117201)

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Publisher's URL: http://link.aps.org/doi/10.1103/PhysRevLett.100.117201

Abstract

We demonstrate an isolated magnetic interface anisotropy in amorphous CoFeB films on (Al)GaAs(001), similar to that in epitaxial films but without a magnetocrystalline anisotropy term. The direction of the easy axis corresponds to that due to the interfacial interaction proposed for epitaxial films. We show that the anisotropy is determined by the relative orbital component of the atomic magnetic moments. Charge transfer is ruled out as the origin of the interface anisotropy, and it is postulated that the spin-orbit interaction in the semiconductor is crucial in determining the magnetic anisotropy.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Chapman, Professor John
Authors: Hindmarch, A.T., Kinane, C.J., MacKenzie, M., Chapman, J.N., Henini, M., Taylor, D., Arena, D.A., Dvorak, J., Hickey, B.J., and Marrows, C.H.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review Letters
Publisher:American Physical Society
ISSN:0031-9007
ISSN (Online):1079-7114

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
402831Spin@RT: Room Temperature SpintronicsJohn ChapmanEngineering & Physical Sciences Research Council (EPSRC)EP/D003199/1Science and Engineering College Senior Management