Antiferromagnetic structure in tetragonal CuMnAs thin films

Wadley P<sup>*</sup>; Hills V; Shahedkhah M R; Edmonds K W; Campion R P; Novak V; Ouladdiaf B; Khalyavin D; Langridge S; Saidl V; Nemec P; Rushforth A W; Gallagher B L; Dhesi S S; Maccherozzi F; Zelezny J; Jungwirth T

doi:10.1038/srep17079

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Antiferromagnetic structure in tetragonal CuMnAs thin films

作者：Wadley P^*; Hills V; Shahedkhah M R; Edmonds K W; Campion R P; Novak V; Ouladdiaf B; Khalyavin D; Langridge S; Saidl V; Nemec P; Rushforth A W; Gallagher B L; Dhesi S S; Maccherozzi F; Zelezny J; Jungwirth T

来源：Scientific Reports, 2015, 5(1): 17079.

DOI：10.1038/srep17079

摘要

Tetragonal CuMnAs is an antiferromagnetic material with favourable properties for applications in spintronics. Using a combination of neutron diffraction and x-ray magnetic linear dichroism, we determine the spin axis and magnetic structure in tetragonal CuMnAs, and reveal the presence of an interfacial uniaxial magnetic anisotropy. From the temperature-dependence of the neutron diffraction intensities, the Neel temperature is shown to be (480 +/- 5) K. Ab initio calculations indicate a weak anisotropy in the (ab) plane for bulk crystals, with a large anisotropy energy barrier between in-plane and perpendicular-to-plane directions.