Enhancement of Ferromagnetism by Cr Doping in Ni-Mn-Cr-Sb Heusler Alloys

Authors

Mahmud Khan, University of Alberta
Igor Dubenko, Southern Illinois University Carbondale
Shane Stadler, Louisiana State University
J. Jung, University of Alberta
S. S. Stoyko, University of Alberta
Arthur Mar, University of Alberta
Abdiel Quetz, Southern Illinois University Carbondale
Tampas Samanta, Southern Illinois University Carbondale
Naushad Ali, Southern Illinois University Carbondale
K. H. Chow, University of Alberta

Comments

© 2013 American Institute of Physics

Published in Applied Physics Letters Vol. 102 No. 112402 (2013) at doi: 10.1063/1.4795627

Abstract

A series of Mn rich Ni₅₀Mn_37-xCr_xSb₁₃ Heusler alloys have been investigated by dc magnetization and electrical resistivity measurements. Due to the weakening of the Ni-Mn hybridization, the martensitic transition shifts to lower temperatures with increasing Cr concentration, while the saturation magnetization at 5K increases. The magnetoresistance and exchange bias properties are dramatically suppressed with increasing Cr concentration. The observed behaviors suggest that substitution of Cr for Mn in Ni₅₀Mn_37-xCr_xSb₁₃ Heusler alloys not only destabilizes the martensitic phase but also enhances ferromagnetism in the system. The possible mechanisms responsible for the observed behavior are discussed.

Recommended Citation

Khan, Mahmud, Dubenko, Igor, Stadler, Shane, Jung, J., Stoyko, S. S., Mar, Arthur, Quetz, Abdiel, Samanta, Tampas, Ali, Naushad and Chow, K. H. "Enhancement of Ferromagnetism by Cr Doping in Ni-Mn-Cr-Sb Heusler Alloys." (Mar 2013).