%0 Journal Article
%A Mikhaylovskiy, R. V.
%A Hendry, E.
%A Secchi, A.
%A Mentink, J. H.
%A Eckstein, M.
%A Wu, A.
%A Pisarev, R. V.
%A Kruglyak, V. V.
%A Katsnelson, M. I.
%A Rasing, Th.
%A Kimel, A. V.
%T Ultrafast optical modification of exchange interactions in iron oxides
%J Nature Communications
%V 6
%@ 2041-1723
%C London
%I Nature Publishing Group
%M PUBDB-2016-02875
%P 8190 -
%D 2015
%X 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 10<sup>3</sup> 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000363017100017
%$ pmid:26373688
%R 10.1038/ncomms9190
%U https://bib-pubdb1.desy.de/record/301806