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Antiferromagnetic structure in tetragonal CuMnAs thin films.

P Wadley1, V Hills1, M R Shahedkhah1

  • 1School of Physics and Astronomy, University of Nottingham, NG7 2RD, United Kingdom.

Scientific Reports
|November 26, 2015
PubMed
Summary

Tetragonal CuMnAs, an antiferromagnetic material, shows promise for spintronics. Researchers mapped its magnetic structure and found interfacial anisotropy, with a Néel temperature of 480 K.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Spintronics

Background:

  • Tetragonal CuMnAs is an antiferromagnetic material.
  • It possesses properties suitable for spintronic applications.

Purpose of the Study:

  • Determine the spin axis and magnetic structure of tetragonal CuMnAs.
  • Investigate interfacial uniaxial magnetic anisotropy.
  • Characterize the material's magnetic properties and anisotropy.

Main Methods:

  • Neutron diffraction
  • X-ray magnetic linear dichroism
  • Ab initio calculations

Main Results:

  • The spin axis and magnetic structure were determined.
  • An interfacial uniaxial magnetic anisotropy was identified.
  • The Néel temperature was found to be (480 ± 5) K.
  • Bulk crystals exhibit weak in-plane anisotropy but a large energy barrier for perpendicular magnetization.

Conclusions:

  • Tetragonal CuMnAs has a well-defined magnetic structure and anisotropy.
  • The material's properties are consistent with spintronic applications.
  • Understanding its anisotropy is crucial for device design.