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Contributions from coherent and incoherent lattice excitations to ultrafast optical control of magnetic anisotropy of metallic films
Author(s): Vladimir N. Kats; Tatiana L. Linnik; Alexey S. Salasyuk; Andrew W. Rushforth; Mu Wang; Peter Wadely; Andrey V. Akimov; Stuart A. Cavill; Václav Holý; Alexandra M. Kalashnikova; Alexey V. Scherbakov
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Paper 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 _lm; and this contribution may be comparable to or even dominate over the contribution from the temperature increase itself, considered as incoherent phonons.

Paper Details

Date Published: 1 July 2016
PDF: 5 pages
Proc. SPIE 9835, Ultrafast Bandgap Photonics, 98351Q (1 July 2016); doi: 10.1117/12.2238020
Show Author Affiliations
Vladimir N. Kats, Ioffe Physical-Technical Institute (Russian Federation)
Tatiana L. Linnik, V.E. Lashkaryov Institute of Semiconductor Physics (Ukraine)
Alexey S. Salasyuk, Ioffe Physical-Technical Institute (Russian Federation)
Andrew W. Rushforth, The Univ. of Nottingham (United Kingdom)
Mu Wang, Univ. College London (United Kingdom)
Peter Wadely, The Univ. of Nottingham (United Kingdom)
Andrey V. Akimov, The Univ. of Nottingham (United Kingdom)
Stuart A. Cavill, Univ. of York (United Kingdom)
Václav Holý, Charles Univ. in Prague (Czech Republic)
Alexandra M. Kalashnikova, Ioffe Physical-Technical Institute (Russian Federation)
Alexey V. Scherbakov, Ioffe Physical-Technical Institute (Russian Federation)

Published in SPIE Proceedings Vol. 9835:
Ultrafast Bandgap Photonics
Michael K. Rafailov; Eric Mazur, Editor(s)

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