Magnetoresistance and Magnetocaloric Effect at a Structural Phase Transition from a Paramagnetic Martensitic State to a Paramagnetic Austenitic State in Ni50Mn36.5In13.5 Heusler Alloys

Authors

Arjun K. Pathak, Southern Illinois University Carbondale
Igor Dubenko, Southern Illinois University Carbondale
Christopher Pueblo, Southern Illinois University Carbondale
Shane Stadler, Louisiana State University
Naushad Ali, Southern Illinois University Carbondale

Comments

© 2010 American Institute of Physics

Published in Applied Physics Letters, Vol. 96 No. 17 (2010) at doi: 10.1063/1.3422483

Abstract

It is established, using magnetization measurements, that Ni₅₀Mn_36.5In_13.5 is in a paramagnetic state (PS) above and below the martensitic transition temperature (T_M). Magnetoresistance (MR) and magnetic entropy changes (ΔS_M) in the vicinity of T_M were studied. MR and ΔS_M at T_M were found to be ≈−8% and ≈ +24 J Kg⁻¹ K⁻¹, respectively, at ΔH = 5 T. Although MR and ΔS_M values were lower than compared to those found in other Heusler systems, the significantly smaller hysteresis observed in Ni₅₀Mn_36.5In_13.5 makes this compound, and other such compounds that undergo a martensitic transition in a PS, promising for the study and applications of magnetocaloric magnetic materials.

Recommended Citation

Pathak, Arjun K., Dubenko, Igor, Pueblo, Christopher, Stadler, Shane and Ali, Naushad. "Magnetoresistance and Magnetocaloric Effect at a Structural Phase Transition from a Paramagnetic Martensitic State to a Paramagnetic Austenitic State in Ni50Mn36.5In13.5 Heusler Alloys." (Apr 2010).