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Spatially resolved ultrafast magnetic dynamics initiated at a complex oxide heterointerface

Först, M.
Caviglia, A. D.
Mankowsky, R.
Khanna, V.
Bromberger, H.
Wilkins, S. B.
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Published in Nature Materials. 2015, vol. 14, no. 9, p. 883-888
Abstract Static strain in complex oxide heterostructures1, 2 has been extensively used to engineer electronic and magnetic properties at equilibrium3. In the same spirit, deformations of the crystal lattice with light may be used to achieve functional control across heterointerfaces dynamically4. Here, by exciting large-amplitude infrared-active vibrations in a LaAlO3 substrate we induce magnetic order melting in a NdNiO3 film across a heterointerface. Femtosecond resonant soft X-ray diffraction is used to determine the spatiotemporal evolution of the magnetic disordering. We observe a magnetic melt front that propagates from the substrate interface into the film, at a speed that suggests electronically driven motion. Light control and ultrafast phase front propagation at heterointerfaces may lead to new opportunities in optomagnetism, for example by driving domain wall motion to transport information across suitably designed devices.
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Other version: http://www.nature.com/doifinder/10.1038/nmat4341
Research group Groupe Triscone
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FÖRST, M. et al. Spatially resolved ultrafast magnetic dynamics initiated at a complex oxide heterointerface. In: Nature Materials, 2015, vol. 14, n° 9, p. 883-888. https://archive-ouverte.unige.ch/unige:75091

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Deposited on : 2015-09-08

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