Ni-doping assisted modification of the non-collinear antiferromagnetic ordering in Mn5Si3 alloy
Ni-doping assisted modification of the non-collinear antiferromagnetic ordering in Mn5Si3 alloy
Adhikari, S. K.; Roy, R.; Das, S. C.; Sannigrahi, J.; Pramanick, S.; Chattopadhyay, S.; Ritter, C.; Adroja, D. T.; Chatterjee, S.
Abstract
Ni-doped Mn5Si3 alloys of nominal compositions Mn5-xNixSi3 (for x = 0.05, 0.1, and 0.2) have been investigated through detailed neutron powder diffraction (NPD) studies in zero magnetic field and ambient pressure. At room temperature, all three Ni-doped alloys crystallize with D88 type hexagonal structure having P63∕mcm space group. These alloys undergo paramagnetic → collinear antiferromagnetic → non-collinear antiferromagnetic transitions on cooling from room temperature. A significant decrease in collinear to non-collinear antiferromagnetic transition temperature has been observed with increasing Ni concentration. The magnetic structure of both antiferromagnetic phases can be described by the magnetic propagation vector k = (0,1,0). However, the moment size and the orientation in the non-collinear antiferromagnetic phase are found to be notably affected by the Ni-doping. Approaching near-parallel arrangement of Mn-moments with increasing Ni-doping is found to be responsible for the gradual disappearance of unusual magnetic properties (inverted hysteresis loop, thermomagnetic irreversibility, etc.) observed in Mn5Si3 alloy.
Beteiligte Forschungsanlagen
- Hochfeld-Magnetlabor (HLD)
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Journal of Alloys and Compounds 967(2023), 171752
DOI: 10.1016/j.jallcom.2023.171752
Cited 1 times in Scopus
Permalink: https://www.hzdr.de/publications/Publ-37591