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Contributions from coherent and incoherent lattice excitations to ultrafast optical control of magnetic anisotropy of metallic films

Kats, Vladimir N.; Linnik, Tatiana L.; Salasyuk, Alexey S.; Rushforth, Andrew W.; Wang, Mu; Wadley, Peter; Akimov, Andrey V.; Cavill, Stuart A.; Holy, Vaclav; Kalashnikova, Alexandra M.; Scherbakov, Alexey V.

Authors

Vladimir N. Kats

Tatiana L. Linnik

Alexey S. Salasyuk

MU WANG Mu.Wang@nottingham.ac.uk
Research Fellow in Antiferromagnetic Spintronics

PETER WADLEY PETER.WADLEY@NOTTINGHAM.AC.UK
Principal Research Fellow

Andrey V. Akimov

Stuart A. Cavill

Vaclav Holy

Alexandra M. Kalashnikova

Alexey V. Scherbakov



Abstract

Spin-lattice coupling is one of the most prominent interactions mediating response of spin ensemble to ultrafast optical excitation. Here we exploit optically generated coherent and incoherent phonons to drive coherent spin dynamics, i.e. precession, in thin films of magnetostrictive metal Galfenol. We demonstrate unambiguously that coherent phonons, also seen as dynamical strain generated due to picosecond lattice temperature raise, give raise to magnetic anisotropy changes of the optically excited magnetic film; and this contribution may be comparable to or even dominate over the contribution from the temperature increase itself, considered as incoherent phonons.

Journal Article Type Article
Publication Date Jul 1, 2016
Journal Proceedings of SPIE
Print ISSN 0277-786X
Electronic ISSN 1996-756X
Publisher Society of Photo-optical Instrumentation Engineers
Peer Reviewed Peer Reviewed
Volume 9835
Issue 98351Q
APA6 Citation Kats, V. N., Linnik, T. L., Salasyuk, A. S., Rushforth, A. W., Wang, M., Wadley, P., …Scherbakov, A. V. (2016). Contributions from coherent and incoherent lattice excitations to ultrafast optical control of magnetic anisotropy of metallic films. Proceedings of SPIE, 9835(98351Q), https://doi.org/10.1117/12.2238020
DOI https://doi.org/10.1117/12.2238020
Keywords laser-induced magnetization dynamics, magnetostrictive materials, magnetic anisotropy
Publisher URL http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=2532769
Related Public URLs http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=2532769
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
Additional Information Vladimir N. Kats ; Tatiana L. Linnik ; Alexey S. Salasyuk ; Andrew W. Rushforth ; Mu Wang, et al.
"Contributions from coherent and incoherent lattice excitations to ultrafast optical control of magnetic anisotropy of metallic films", Proc. SPIE 9835, Ultrafast Bandgap Photonics, 98351Q (July 1, 2016); doi:10.1117/12.2238020.

Copyright 2016 Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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