Direct Measurements of Field-Induced Adiabatic Temperature Changes Near Compound Phase Transitions in Ni–Mn–In Based Heusler Alloys

Authors

A. P. Kazakov, Moscow State University
V. N. Prudnikov, Moscow State University
A. B. Granovsky, Moscow State University
A. P. Zhukov, Basque Country University
J. Gonzalez, Basque Country University
I. Dubenko, Southern Illinois University Carbondale
A. K. Pathak, Southern Illinois University Carbondale
S. Stadler, Louisiana State University
N. Ali, Southern Illinois University Carbondale

Comments

© 2011 American Institute of Physics

Published in Applied Physics Letters, Vol. 98 No. 13 (2011) at doi: 10.1063/1.3574088

Abstract

The adiabatic temperature changes (ΔT_ad) in the vicinity of the Curie and martensitic transition temperatures of Ni₅₀Mn₃₅In₁₅ and Ni₅₀Mn₃₅In₁₄Z (Z = Al and Ge) Heusler alloys have been studied using an adiabatic magnetocalorimeter of 250–350 K temperature interval for applied magnetic field changes up to ΔH = 1.8 T. The largest measured changes were ΔT_ad = −2 and 2 K near the martensitic (first-order) and ferromagnetic (second-order) transitions for ΔH = 1.8 T, respectively. It was observed that |ΔT_ad| ≈ 1 K for relatively small field changes (ΔH = 1 T) for both types of transitions. The results indicate that these materials should be further explored as potential working materials in magnetic refrigeration applications.

Recommended Citation

Kazakov, A. P., Prudnikov, V. N., Granovsky, A. B., Zhukov, A. P., Gonzalez, J., Dubenko, I., Pathak, A. K., Stadler, S. and Ali, N.. "Direct Measurements of Field-Induced Adiabatic Temperature Changes Near Compound Phase Transitions in Ni–Mn–In Based Heusler Alloys." (Mar 2011).