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  Ultrafast optical modification of exchange interactions in iron oxides

Mikhaylovskiy, R. V., Hendry, E., Secchi, A., Mentink, J. H., Eckstein, M., Wu, A., et al. (2015). Ultrafast optical modification of exchange interactions in iron oxides. Nature Communications, 6: 8190. doi:10.1038/ncomms9190.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0028-9021-8 Version Permalink: https://hdl.handle.net/11858/00-001M-0000-002A-606B-5
Genre: Journal Article

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 Creators:
Mikhaylovskiy, R. V.1, 2, Author
Hendry, E.1, Author
Secchi, A.2, Author
Mentink, Johan H.3, 4, Author           
Eckstein, Martin3, 4, Author           
Wu, A.5, Author
Pisarev, R. V.6, Author
Kruglyak, V. V.1, Author
Katsnelson, M. I.2, Author
Rasing, T.2, Author
Kimel, A. V.2, Author
Affiliations:
1School of Physics, University of Exeter, Stocker Road, Exeter EX4 4QL, UK, ou_persistent22              
2Radboud University Nijmegen, Institute for Molecules and Materials, Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands, ou_persistent22              
3Center for Free-Electron Laser Science, Luruper Chaussee 149, 22761 Hamburg, Germany, ou_persistent22              
4Theory of Correlated Systems out of Equilibrium, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938296              
5Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China, ou_persistent22              
6Ioffe Physical-Technical Institute, Russian Academy of Sciences, 194021 St Petersburg, Russia, ou_persistent22              

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Free keywords: Physical sciences; Applied physics; Condensed matter; Theoretical physics
 Abstract: Ultrafast non-thermal manipulation of magnetization by light relies on either indirect coupling of the electric field component of the light with spins via spin-orbit interaction or direct coupling between the magnetic field component and spins. Here we propose a scenario for coupling between the electric field of light and spins via optical modification of the exchange interaction, one of the strongest quantum effects with strength of 103 Tesla. We demonstrate that this isotropic opto-magnetic effect, which can be called inverse magneto-refraction, is allowed in a material of any symmetry. Its existence is corroborated by the experimental observation of terahertz emission by spin resonances optically excited in a broad class of iron oxides with a canted spin configuration. From its strength we estimate that a sub-picosecond modification of the exchange interaction by laser pulses with fluence of about 1 mJ cm−2 acts as a pulsed effective magnetic field of 0.01 Tesla.

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Language(s): eng - English
 Dates: 2015-01-082015-07-292015-09-16
 Publication Status: Published online
 Pages: 9
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1038/ncomms9190
arXiv: 1412.7094
 Degree: -

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Title: Nature Communications
  Abbreviation : Nat. Commun.
Source Genre: Journal
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Publ. Info: London : Nature Publishing Group
Pages: - Volume / Issue: 6 Sequence Number: 8190 Start / End Page: - Identifier: ISSN: 2041-1723
CoNE: https://pure.mpg.de/cone/journals/resource/2041-1723