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Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
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Inverse spin Hall effect in a complex ferromagnetic oxide heterostructure.

Martin Wahler1, Nico Homonnay1, Tim Richter1

  • 1Institut für Physik, Martin-Luther University Halle-Wittenberg, Halle, 06120, Germany.

Scientific Reports
|June 28, 2016
PubMed
Summary

We demonstrate spin pumping and the inverse spin Hall effect (ISHE) in complex oxide heterostructures. Strontium ruthenate (SRO) exhibits ISHE comparable to platinum, even below its Curie temperature.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Spintronics

Background:

  • Spin pumping and the inverse spin Hall effect (ISHE) are crucial phenomena in spintronics.
  • Complex oxide heterostructures offer unique platforms for exploring spin-related phenomena.
  • Strontium ruthenate (SRO) is a ferromagnetic metal with a low Curie temperature, making it interesting for temperature-dependent studies.

Purpose of the Study:

  • To investigate spin pumping and ISHE in an epitaxial La0.7Sr0.3MnO3 (LSMO)/SrRuO3 (SRO) heterostructure.
  • To compare the ISHE in SRO with that in platinum (Pt).
  • To study the temperature dependence of ISHE in SRO, particularly below its Curie temperature.

Main Methods:

  • Epitaxial growth of LSMO/SRO heterostructures.
  • Spin pumping experiments using ferromagnetic resonance (FMR).
  • Measurement of the inverse spin Hall voltage in the SRO layer.

Main Results:

  • Observation of spin pumping from LSMO to SRO.
  • SRO exhibits a significant ISHE, comparable in magnitude but with an opposite sign to that of Pt.
  • A finite ISHE signal was detected in SRO even 50 K below its Curie temperature (155 K).

Conclusions:

  • Epitaxial SRO is a viable material for ISHE studies in complex oxide heterostructures.
  • SRO demonstrates efficient spin-to-charge conversion, making it a promising material for spintronic applications.
  • The temperature-dependent ISHE in SRO provides insights into the interplay between magnetism and spin-charge conversion.