TY - JOUR
T1 - Magnetic correlations in martensitic Ni-Mn-based Heusler shape-memory alloys
T2 - Neutron polarization analysis
AU - Aksoy, S.
AU - Acet, M.
AU - Deen, P. P.
AU - Mañosa, L.
AU - Planes, A.
PY - 2009/6/3
Y1 - 2009/6/3
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=67650072599&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.79.212401
DO - 10.1103/PhysRevB.79.212401
M3 - Article
AN - SCOPUS:67650072599
SN - 1098-0121
VL - 79
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 21
M1 - 212401
ER -