1. Room-temperature antiferromagnetism in CuMnAs
- Author
-
O. Stelmakhovych, F. Máca, Peter Wadley, Klára Uhlířová, Přemysl Beran, Václav Novák, Tomas Jungwirth, J. Mašek, Xavi Marti, and Helena Reichlova
- Subjects
Materials science ,Magnetic structure ,Condensed matter physics ,02 engineering and technology ,Electronic structure ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Semimetal ,Electronic, Optical and Magnetic Materials ,Condensed Matter::Materials Science ,Magnetization ,Differential thermal analysis ,0103 physical sciences ,Antiferromagnetism ,Condensed Matter::Strongly Correlated Electrons ,Orthorhombic crystal system ,010306 general physics ,0210 nano-technology ,Néel temperature - Abstract
We report on an experimental and theoretical study of CuMn–V compounds. In agreement with previous works we find low-temperature antiferromagnetism with Neel temperature of 50 K in the cubic half-Heusler CuMnSb. We demonstrate that the orthorhombic CuMnAs is a room-temperature antiferromagnet. Our results are based on X-ray diffraction, magnetization, transport, and differential thermal analysis measurements, and on density-functional theory calculations of the magnetic structure of CuMn–V compounds. In the discussion part of the paper we make a prediction, based on our density-functional theory calculations, that the electronic structure of CuMn–V compounds makes a transition from a semimetal to a semiconductor upon introducing the lighter group-V elements.
- Published
- 2012
- Full Text
- View/download PDF