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Enhanced electron-magnon scattering in ferromagnetic thin films and the breakdown of the Mott two-current model

Rowan-Robinson, R.M.; Hindmarch, A.T.; Atkinson, D.

Enhanced electron-magnon scattering in ferromagnetic thin films and the breakdown of the Mott two-current model Thumbnail


Authors

R.M. Rowan-Robinson



Abstract

Electron-magnon spin-flip scattering in thin films was studied by investigating the thickness dependence of the anisotropic magnetoresistance (AMR) effect and spin-wave stiffness. The absolute resistivity change due to the AMR effect (Δρ) in Ni, Ni:V, and Ni:Cr doped films reduced with film thickness. This loss of AMR is due to enhanced spin-flip scattering, dropping at the same thickness irrespective of dopant. The spin-wave stiffness reduced at the same thickness, confirming enhanced electron-magnon spin-flip scattering. The AMR ratio was fitted with a simple model, in which thickness dependence was included in a spin mixing resistivity term. This analysis gives insight into the fundamental contribution of magnon scattering to the resistivity in thin films, which ultimately has relevance to spin coherence in spintronic devices.

Citation

Rowan-Robinson, R., Hindmarch, A., & Atkinson, D. (2014). Enhanced electron-magnon scattering in ferromagnetic thin films and the breakdown of the Mott two-current model. Physical review B, 90(10), https://doi.org/10.1103/physrevb.90.104401

Journal Article Type Article
Acceptance Date Sep 2, 2014
Online Publication Date Sep 2, 2014
Publication Date Sep 2, 2014
Deposit Date Sep 12, 2014
Publicly Available Date Mar 28, 2024
Journal Physical Review B
Print ISSN 1098-0121
Electronic ISSN 1550-235X
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 90
Issue 10
DOI https://doi.org/10.1103/physrevb.90.104401

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Copyright Statement
Reprinted with permission from the American Physical Society: Rowan-Robinson, R.M., Hindmarch, A.T. and Atkinson, D. (2014) 'Enhanced electron-magnon scattering in ferromagnetic thin films and the breakdown of the Mott two-current model.', Physical review B, 90 (10): 104401. © 2014 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.





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