Magnetic and Electrical Properties of Ni50Mn35In15−xSix Heusler Alloys

Authors

Arjun Kumar Pathak, Southern Illinois University Carbondale
Igor Dubenko, Southern Illinois University Carbondale
Shane Stadler, Louisiana State University
Naushad Ali, Southern Illinois University Carbondale

Comments

© 2009 American Institute of Physics

Published in Journal of Applied Physics, Vol. 105 No. 7 (2009) at doi: 10.1063/1.3067446

Abstract

We have studied the magnetic and electrical properties of the polycrystalline ferromagnetic Ni₅₀Mn₃₅In_15−xSi_x (1 ≤ x ≤ 5) Heusler alloys through magnetization, thermal expansion, and resistivity measurements. It was observed that an increase in Si concentration strongly affects the ground state of the martensitic phase and the magnetic properties of compounds. A magnetic phase diagram has been constructed for these alloys. It was found that both martensitic transition temperature (T_M) and Curie temperature of austenitic phase (T_C) decrease, while ferromagnetic ordering temperature of the martensitic phase increases with increasing Si concentration. The magnetoresistance (Δρ/ρ) associated with martensitic transformation was found to vary from –47% for x = 2 at T = 261 K to −26% for x = 5 at T = 230 K for a magnetic field change of 5 T.

Recommended Citation

Pathak, Arjun K., Dubenko, Igor, Stadler, Shane and Ali, Naushad. "Magnetic and Electrical Properties of Ni50Mn35In15−xSix Heusler Alloys." (Apr 2009).