Publication Type:Journal Article
Source:Journal of Physics Condensed Matter, Institute of Physics Publishing, Volume 28, Number 32 (2016)
Keywords:electrons, Free electron lasers, Iridates, Localized magnetic moments, Magnetic moments, Magnetism, Optical pumping, Relaxation time scale, Resonant diffraction, Resonant x-ray diffraction, Spin-orbit couplings, Time measurement, Time resolved studies, X ray diffraction, X-ray studies
We report a time-resolved study of the ultrafast dynamics of the magnetic moments formed by the states in Sr2IrO4 by directly probing the localized iridium 5d magnetic state through resonant x-ray diffraction. Using optical pump-hard x-ray probe measurements, two relaxation time scales were determined: a fast fluence-independent relaxation is found to take place on a time scale of 1.5 ps, followed by a slower relaxation on a time scale of 500 ps-1.5 ns. © 2016 IOP Publishing Ltd.
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