Spatially resolved ultrafast magnetic dynamics initiated at a complex oxide heterointerface

M Först, A Caviglia, R Scherwitzl, R Mankowsky, P Zubko, V Khanna, H Bromberger, SB Wilkins, YD Chuang, WS Lee, wf Schlotter, JJ Turner, GL Dakovski, MP Minitti, J Robinson, SR Clark, D Jaksch, JM Triscone, JP Hill, SS DhesiA Cavalleri

    Research output: Contribution to journalArticleScientificpeer-review

    64 Citations (Scopus)

    Abstract

    Static strain in complex oxide heterostructures(1,2) has been extensively used to engineer electronic and magnetic properties at equilibrium(3). In the same spirit, deformations of the crystal lattice with light may be used to achieve functional control across heterointerfaces dynamically(4). 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.
    Original languageEnglish
    Pages (from-to)883-889
    Number of pages7
    JournalNature Materials
    Volume14
    Issue number9
    Publication statusPublished - 2015

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    Först, M., Caviglia, A., Scherwitzl, R., Mankowsky, R., Zubko, P., Khanna, V., Bromberger, H., Wilkins, SB., Chuang, YD., Lee, WS., Schlotter, W., Turner, JJ., Dakovski, GL., Minitti, MP., Robinson, J., Clark, SR., Jaksch, D., Triscone, JM., Hill, JP., ... Cavalleri, A. (2015). Spatially resolved ultrafast magnetic dynamics initiated at a complex oxide heterointerface. Nature Materials, 14(9), 883-889.