Enhancement of Curie temperature in Mn2RuSn by Co substitution

A. Nelson, P. Kharel, Y. Huh, R. Fuglsby, J. Guenther, W. Zhang, B. Staten, P. Lukashev, S. Valloppilly, D. J. Sellmyer

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12 Scopus citations

Abstract

The Co-substituted Mn2RuSn nanomaterials, namely, Mn2Ru0.5Co0.5Sn and Mn2Ru0.35Co0.65Sn have been synthesized and investigated. The presence of Co in the Mn2RuSn (a = 6.21 Å) decreased the lattice parameter, where a = 6.14 Å and 6.12 Å for the as prepared Mn2Ru0.5Co0.5Sn and Mn2Ru0.35Co0.65Sn, respectively. The samples show a ferrimagnetic spin order with relatively small coercivities, similar to those of soft magnetic materials. There is a substantial increase in the Curie temperature (Tc = 448 K for Mn2Ru0.5Co0.5Sn and 506 K for Mn2Ru0.35Co0.65Sn) of Mn2RuSn (Tc = 272.1 K) due to Co substitution, which is a result of strengthening of the positive exchange interaction in this material. These materials are highly stable against heat treatment of up to 450 °C. The first-principles calculations are consistent with our experimentally observed structural and magnetic properties. They also provide insight on how the magnetic and electronic structures change when Ru is replaced with Co in Mn2RuSn.

Original languageEnglish (US)
Article number153906
JournalJournal of Applied Physics
Volume117
Issue number15
DOIs
StatePublished - Apr 21 2015

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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