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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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Highly Energy-Efficient Spin Current Generation in SrIrO3 by Manipulating the Octahedral Rotation.

Qihan Zhang1, Shu Shi1, Zhenyi Zheng1

  • 1Department of Materials Science and Engineering, National University of Singapore, Singapore 117575, Singapore.

ACS Applied Materials & Interfaces
|December 20, 2023
PubMed
Summary
This summary is machine-generated.

Epitaxial strain significantly enhances spin-orbit torque (SOT) efficiency in complex oxide heterostructures. Modulating strain in SrIrO3/Ni81Fe19 bilayers improved SOT efficiency tenfold, advancing spintronic device applications.

Keywords:
octahedral rotationreciprocal space mappingspin Hall effectspin-torque ferromagnetic resonancespin−orbit torquetransition-metal perovskite oxides

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Spintronics

Background:

  • Materials with strong spin-orbit coupling (SOC) are crucial for energy-efficient spintronic devices.
  • Transition-metal perovskite oxides exhibit efficient charge-spin interconversion due to strong SOC.

Purpose of the Study:

  • To investigate the influence of epitaxial strain on spin-orbit torque (SOT) efficiency.
  • To explore the relationship between octahedral rotation and SOT efficiency in SrIrO3/Ni81Fe19 bilayers.

Main Methods:

  • Systematic investigation of SOT efficiency in SrIrO3 (SIO)/Ni81Fe19 (Py) bilayers.
  • Modulation of epitaxial strain using various substrates.

Main Results:

  • SOT efficiency is strongly correlated with octahedral rotation in SIO.
  • Epitaxial strain improved SOT efficiency by a factor of 10, from 0.15 to 1.45.
  • Demonstrated a 10-fold enhancement in SOT efficiency.

Conclusions:

  • Modulating epitaxial strain is an effective strategy to control SOT efficiency in complex oxide heterostructures.
  • This work facilitates the application of complex oxides in advanced spintronic devices.