Spatially resolved ultrafast magnetic dynamics initiated at a complex oxide heterointerface

Journal article (2015)

Authors

M. Först External organisation
A. Caviglia QN/Mol. Electronics & Devices
wf Schlotter External organisation
JJ Turner External organisation
GL Dakovski External organisation
MP Minitti External organisation
J Robinson External organisation
SR Clark External organisation
D Jaksch External organisation
JM Triscone External organisation
JP Hill External organisation
S. S. Dhesi External organisation
R Scherwitzl External organisation
A. Cavalleri External organisation
R. Mankowsky External organisation
P Zubko External organisation
V Khanna External organisation
H Bromberger External organisation
SB Wilkins External organisation
YD Chuang External organisation
WS Lee External organisation
Research Group
QN/Mol. Electronics & Devices
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Published Date

2015

Language

English

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Research Group

QN/Mol. Electronics & Devices

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.