Nonlinear influence of excess Mn on the magnetoelastic transition in (Mn,Cr)2Sb

Qi Shen*, Ivan Batashev, Hamutu Ojiyed, Fengqi Zhang, Niels van Dijk, Ekkes Brück

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)
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Abstract

The influence of excess Mn on the magnetoelastic ferromagnetic-to-antiferromagnetic transition Tt in the magnetocaloric compound (Mn,Cr)2Sb has been studied. With increasing excess Mn the magnetoelastic transition temperature for (Mn,Cr)2Sb initially increases and then decreases. This trend is accompanied by a strong reduction of the (Mn,Cr)Sb secondary phase. With increasing excess Mn a higher Cr content was found in the (Mn,Cr)Sb secondary phase in comparison to the matrix phase. This competition for Cr leads to a nonlinear dependence of Tt with increasing excess Mn at a fixed nominal Cr content. However, we observed that Tt depends linear on the c/a ratio for a wide range of temperatures from 170 to 350 K. A compositional diagram of the c/a ratio was constructed to assist the selection of (Mn,Cr)2Sb alloys with a desired transition temperature.

Original languageEnglish
Article number164011
Number of pages6
JournalJournal of Alloys and Compounds
Volume903
DOIs
Publication statusPublished - 2022

Keywords

  • Exchange inversion
  • Magnetocaloric materials
  • Magnetoelastic transition

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