Neutron diffraction study of the Cr84.7Re15.3 alloy
| Autor: | A. R. E. Prinsloo, B. S. Jacobs, Zeldah N. Sentsho, C. J. Sheppard, A. J. Studer, Andrew M. Venter |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Materials science Condensed matter physics Heisenberg model Magnetism Neutron diffraction General Physics and Astronomy Fermi surface 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences lcsh:QC1-999 0103 physical sciences Antiferromagnetism Ising model Neutron Condensed Matter::Strongly Correlated Electrons 0210 nano-technology Néel temperature lcsh:Physics |
| Zdroj: | AIP Advances, Vol 11, Iss 1, Pp 015037-015037-4 (2021) |
| ISSN: | 2158-3226 |
| Popis: | 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 Neel 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. |
| Databáze: | OpenAIRE |
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