Journal Article

PreJuSER-10020

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Spin-orbit strength driven crossover between intrinsic and extrinsic mechanisms of the anomalous Hall effect in the epitaxial L1o-ordered ferromagnets FePd and FePt

Seemann, K. M.FZJ* ; Mokrousov, Y.FZJ* ; Azis, A. ; Miguel, J. ; Kronast, F. ; Kuch, W. ; Blamire, M. G. ; Hindmarch, A. T ; Hickey, B. J. ; Souza, I. ; Marrows, C. H.

2010
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/7240  doi:10.1103/PhysRevLett.104.076402

Abstract: We determine the composition of intrinsic as well as extrinsic contributions to the anomalous Hall effect (AHE) in the isoelectronic L1(0) FePd and FePt alloys. We show that the AHE signal in our 30 nm thick epitaxially deposited films of FePd is mainly due to an extrinsic side jump, while in the epitaxial FePt films of the same thickness and degree of order the intrinsic contribution is dominating over the extrinsic mechanisms of the AHE. We relate this crossover to the difference in spin-orbit strength of Pt and Pd atoms and suggest that this phenomenon can be used for tuning the origins of the AHE in complex alloys.

Keyword(s): J

Note: The authors thank G. Obermeier, J. Cunningham, M. C. Hickey, and A. Blackburn for fruitful discussions and P. Cale, G. Butterworth, and T. Haynes for technical assistance. Financial support by the UK EPSRC (Spin@ RT), by the BMBF (05KS4UK1/4), and the DFG (Project No. MO 1731/1-1) is gratefully acknowledged.

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Contributing Institute(s):

1. Elektronische Eigenschaften (IFF-9)
2. Quanten-Theorie der Materialien (IFF-1)

Research Program(s):

1. Grundlagen für zukünftige Informationstechnologien (P42)

Appears in the scientific report 2010

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