Tetragonal phase of epitaxial room-temperature antiferromagnet CuMnAs
Open Access
- 20 August 2013
- journal article
- research article
- Published by Springer Science and Business Media LLC in Nature Communications
- Vol. 4 (1), 1-6
- https://doi.org/10.1038/ncomms3322
Abstract
Recent studies have demonstrated the potential of antiferromagnets as the active component in spintronic devices. This is in contrast to their current passive role as pinning layers in hard disk read heads and magnetic memories. Here we report the epitaxial growth of a new high-temperature antiferromagnetic material, tetragonal CuMnAs, which exhibits excellent crystal quality, chemical order and compatibility with existing semiconductor technologies. We demonstrate its growth on the III–V semiconductors GaAs and GaP, and show that the structure is also lattice matched to Si. Neutron diffraction shows collinear antiferromagnetic order with a high Néel temperature. Combined with our demonstration of room-temperature-exchange coupling in a CuMnAs/Fe bilayer, we conclude that tetragonal CuMnAs films are suitable candidate materials for antiferromagnetic spintronics.This publication has 32 references indexed in Scilit:
- Scanning tunneling microscopy reveals LiMnAs is a room temperature anti-ferromagnetic semiconductorApplied Physics Letters, 2012
- Bistability in Atomic-Scale AntiferromagnetsScience, 2012
- Molecular beam epitaxy of LiMnAsJournal of Crystal Growth, 2011
- A spin-valve-like magnetoresistance of an antiferromagnet-based tunnel junctionNature Materials, 2011
- Tunneling Anisotropic Magnetoresistance in Multilayer-StructuresPhysical Review Letters, 2008
- Coulomb Blockade Anisotropic Magnetoresistance Effect in aSingle-Electron TransistorPhysical Review Letters, 2006
- Theory of ferromagnetic (III,Mn)V semiconductorsReviews of Modern Physics, 2006
- Solid state phase equilibria in the Fe-Ga-As systemThe European Physical Journal Applied Physics, 1998
- X-ray triple-crystal diffractometry of defects in epitaxic layersJournal of Applied Crystallography, 1994
- X-ray double and triple crystal diffractometry of mosaic structure in heteroepitaxial layersJournal of Applied Physics, 1993