Deviation of the magnetization change from the structural phase transition temperature in polycrystalline NiMnSn in low magnetic fields Academic Article uri icon

abstract

  • Magnetization and resistivity were measured as a function of temperature in polycrystalline Ni-Mn-Sn Heusler alloys with a magnetocrystalline first order phase transition. At external magnetic fields <0.2 T the magnetization change associated with the phase transition happened at a temperature up to 5 K lower than the true phase transition temperature measured by electrical resistivity or predicted by thermodynamic theory. We associate this anomaly with magnetic exchange coupling between austenite and martensite phases coexisting near the transition. 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

published proceedings

  • Scripta Materialia

author list (cited authors)

  • Shamberger, P. J., Pakhomov, A. B., Koyama, K., & Ohuchi, F. S.

publication date

  • January 1, 2013 11:11 AM