Back to Search Start Over

Neutron diffraction study of the Cr84.7Re15.3 alloy

Authors :
B. S. Jacobs
A. R. E. Prinsloo
A. M. Venter
Z. N. Sentsho
A. J. Studer
C. J. Sheppard
Source :
AIP Advances, Vol 11, Iss 1, Pp 015037-015037-4 (2021)
Publication Year :
2021
Publisher :
AIP Publishing LLC, 2021.

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.

Subjects

Subjects :
Physics
QC1-999

Details

Language :
English
ISSN :
21583226
Volume :
11
Issue :
1
Database :
Directory of Open Access Journals
Journal :
AIP Advances
Publication Type :
Academic Journal
Accession number :
edsdoj.2486c503ccfc4f9ba44e706ed4e6757c
Document Type :
article
Full Text :
https://doi.org/10.1063/9.0000132