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Title: Paramagnetic to antiferromagnetic transition in epitaxial tetragonal CuMnAs (invited)

In this paper, we use neutron scattering and electrical transport to investigate the paramagnetic to antiferromagnetic phase transition in tetragonal CuMnAs films on GaP(001). X-ray diffraction and cross-sectional transmission electron microscopy measurements show that the films are chemically ordered with high structural quality. The temperature dependence of the structurally forbidden (100) neutron scattering peak is used to determine the Néel temperature, T{sub N}. We then demonstrate the presence of a clear peak in the temperature derivative of the resistivity around T{sub N}. The effect of disorder-induced broadening on the shape of the peak is discussed.
Authors:
; ; ; ; ;  [1] ;  [2] ;  [3] ;  [2] ;  [4]
  1. School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD (United Kingdom)
  2. Institute of Physics ASCR, v.v.i., Cukrovarnická 10, 162 53 Praha 6 (Czech Republic)
  3. Institut Laue-Langevin, 6 Rue Jules Horowitz, 38042 Grenoble (France)
  4. (United Kingdom)
Publication Date:
OSTI Identifier:
22402968
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANTIFERROMAGNETISM; COPPER COMPOUNDS; EPITAXY; FILMS; GALLIUM PHOSPHIDES; MANGANESE ARSENIDES; NEUTRON DIFFRACTION; PARAMAGNETISM; PHASE TRANSFORMATIONS; TEMPERATURE DEPENDENCE; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION