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Title: Spatially resolved ultrafast magnetic dynamics initiated at a complex oxide heterointerface

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. Lastly, 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.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [1] ;  [4] ;  [5] ;  [1] ;  [6] ;  [7] ;  [7] ;  [7] ;  [7] ;  [7] ;  [7] ;  [8] ;  [8] ;  [4] ;  [2] ;  [9] more »;  [10] « less
  1. Max Planck Institute for the Structure and Dynamics of Matter, Hamburg (Germany); Center for Free Electron Laser Science, Hamburg (Germany)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Delft Univ. of Technology, Delft (The Netherlands)
  4. Univ. de Geneve, Geneve (Switzerland)
  5. Max Planck Institute for the Structure and Dynamics of Matter, Hamburg (Germany); Univ. of Oxford, Oxford (United Kingdom); Diamond Light Source, Didcot (United Kingdom)
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  7. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  8. Univ. of Oxford, Oxford (United Kingdom); National Univ. of Singapore (Singapore)
  9. Diamond Light Source, Didcot (United Kingdom)
  10. Max Planck Institute for the Structure and Dynamics of Matter, Hamburg (Germany); Center for Free Electron Laser Science, Hamburg (Germany); Univ. of Oxford, Oxford (United Kingdom)
Publication Date:
OSTI Identifier:
1263906
Report Number(s):
BNL--104927-2016-JA
Journal ID: ISSN 1476-1122; R&D Project: PO011; KC0201060
Grant/Contract Number:
SC00112704
Type:
Accepted Manuscript
Journal Name:
Nature Materials
Additional Journal Information:
Journal Volume: 14; Journal Issue: 9; Journal ID: ISSN 1476-1122
Publisher:
Nature Publishing Group
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY magnetic properties and materials; surfaces, interfaces and thin films