Chemical Composition Tuning of the Anomalous Hall Effect in Isoelectronic L10FePd1xPtx Alloy Films

P. He, L. Ma, Z. Shi, G. Y. Guo, J.-G. Zheng, Y. Xin, and S. M. Zhou
Phys. Rev. Lett. 109, 066402 – Published 8 August 2012
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Abstract

The anomalous Hall effect (AHE) in L10FePd1xPtx alloy films is studied both experimentally and theoretically. We find that the intrinsic contribution (σAHint) to the AHE can be significantly increased, whereas the extrinsic side-jump contribution (σAHsj) can be continuously reduced from being slightly larger than σAHint in L10 FePd to being much smaller than σAHint in L10 FePt, by increasing the Pt composition x. We show that this chemical composition tuning of the intrinsic contribution is afforded by the stronger spin-orbit coupling strength on the Pd/Pt site when the lighter Pd atoms are replaced by the heavier Pt atoms. Our results provide a means of manipulating the competing AHE mechanisms in ferromagnetic alloys for fully understanding the AHE and also for technological applications of ferromagnetic alloys.

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  • Received 4 December 2011

DOI:https://doi.org/10.1103/PhysRevLett.109.066402

© 2012 American Physical Society

Authors & Affiliations

P. He1,2, L. Ma1, Z. Shi1, G. Y. Guo3,4,*, J.-G. Zheng5, Y. Xin6, and S. M. Zhou1,2,†

  • 1Department of Physics, Tongji University, Shanghai 200092, People’s Republic of China
  • 2Department of Physics, Fudan University, Shanghai 200433, People’s Republic of China
  • 3Graduate Institute of Applied Physics, National Chengchi University, Taipei 11605, Taiwan
  • 4Department of Physics and Center for Theoretical Sciences, National Taiwan University, Taipei 10617, Taiwan
  • 5Laboratory for Electron and X-ray Instrumentation, University of California, Irvine, California 92697-2800, USA
  • 6NHMFL, Florida State University, Tallahassee, Florida 32310, USA

  • *gyguo@phys.ntu.edu.tw
  • shiming@tongji.edu.cn

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Vol. 109, Iss. 6 — 10 August 2012

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