Magnetic correlations in martensitic Ni-Mn-based Heusler shape-memory alloys: Neutron polarization analysis

S. Aksoy*, M. Acet, P. P. Deen, L. Mañosa, A. Planes

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

236 Citations (Scopus)

Abstract

In ferromagnetic Ni-Mn-based Heusler alloys undergoing martensitic transformations, a sudden drop in the magnetization is observed as the temperature decreases through the martensitic-transformation temperature Ms. To understand the cause of the drop and thereby the nature of the magnetic coupling in this temperature region, we carry out neutron-polarization-analysis experiments on two prototypes, Ni50 Mn40 Sb10 and Ni50 Mn37 Sn13. We show that in the vicinity of Ms, the magnetic correlations at temperatures T< Ms are antiferromagnetic, whereas they are ferromagnetic above Ms and well beyond the Curie temperature of the austenitic state.

Original languageEnglish
Article number212401
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume79
Issue number21
DOIs
Publication statusPublished - 3 Jun 2009
Externally publishedYes

Fingerprint

Dive into the research topics of 'Magnetic correlations in martensitic Ni-Mn-based Heusler shape-memory alloys: Neutron polarization analysis'. Together they form a unique fingerprint.

Cite this