Effect of Mn-site doping on the magnetofunctional behaviors of Mn5Si3 alloy

• Published in: Journal of magnetism and magnetic materials Vol. 529; p. 167909
• Main Authors: Das, S.C., Pramanick, S., Chatterjee, S.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01-07-2021; Elsevier BV
• Subjects: Alloys; Chromium; Doping; First-order phase transition; Intermetallic compounds; Magnetocaloric effect; Magnetoresistance; Magnetoresistivity; Transition temperature; First-order phase transition; Magnetoresistance; Magnetocaloric effect; Alloys
• ISSN: 0304-8853; 1873-4766
• DOI: 10.1016/j.jmmm.2021.167909

•Ni and Cr have been doped in the Mn site of Mn5Si3 alloy.•The studied alloys undergo two first order transition.•The doped alloys show reasonably large magnetoresistance and magneto-caloric effect.•Magnetoresistance and magneto-caloric effect are greatly affected by Mn-site doping.
Present work reports a detailed investigation on the magnetoresistance and magnetocaloric behavior of Ni and Cr-doped Mn5Si3 alloys with general formula Mn5−xAxSi3 (where A  = Ni/Cr; x = 0, 0.05, 0.1 and 0.2). Both pure (undoped) and doped alloys show a reasonably large amount of magnetoresistance (MR). Doping at Mn-site, both by Ni and Cr, results in a monotonic decrease in MR values. Magnetocaloric effect (MCE), on the other hand, is found to be interesting, and all the alloys show both conventional and inverse MCE around the magneto-structural transition temperature. Among the two types of MCE observed, the inverse MCE is found to decrease with increasing doping concentration and consistent with the MR behavior, whereas doping results in a significant increase in conventional MCE values.