Neutron diffraction study of the Cr84.7Re15.3 alloy
Loading...
Date
2021-01-22
Journal Title
Journal ISSN
Volume Title
Publisher
AIP Publishing
Abstract
Measurements of the temperature dependence of electrical resistance (R) and neutron powder diffraction (NPD) of a Cr84.7Re15.3 alloy is reported. The magnetism originates from the formation of a spin-density-wave (SDW) as a result of nesting between the electron and hole sheets at the Fermi surface (FS). NPD revealed the magnetic character of the SDW to be commensurate (C) with the lattice with a Néel temperature (TN) of 560 ± 5K that correlates to TN = 585 ± 5K determined from the saddle point in the R(T) results. A power law fit Iα(1−TTN)2β of the neutron data gave β = 0.36(1), indicating that the AF ordering follows the 3D Heisenberg model. An additional antiferromagnetic magnetic contribution, associated with Cr2O3, was observed to co-exist in the alloy. Quantification analyses revealed that the Cr2O3 content was less than 2 wt.%. A β value of 0.30(1) was determined for the magnetic phase transition of Cr2O3 in correspondence with the 3D Ising model. © 2021 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license.
Description
Keywords
Neutron diffraction, Chromium, Rhenium, Temperature range, Antiferromagnetism, Electrons, Elements, Alloys, Doped materials, Temperature range
Citation
Jacobs, B. S., Prinsloo, A. R. E., Venter, A. M., Sentsho, Z. N., Studer, A. J., & Sheppard, C. J. (2021). Neutron diffraction study of the Cr84.7Re15.3 alloy. Paper presented to the 65th Annual Conference on Magnetism and Magnetic Materials, Virtually, November 2-6, 2020. In AIP Advances, 11(1). doi:10.1063/9.0000132