Magnetic field dependence of the martensitic transition and magnetocaloric effects in Ni49BiMn35In15

Anil Aryal, Igor Dubenko, Saikat Talapatra, Alexander Granovsky, Erkki Lähderanta, Shane Stadler, Naushad Ali
2020 AIP Advances  
The structural, magnetic, and magnetocaloric properties of the Bi-doped Heusler alloy Ni 49 BiMn 35 In 15 have been investigated using room temperature X-ray diffraction (XRD) and magnetization measurements in a temperature interval of 5-400 K. The alloy at room temperature was found to be in a mixture of a high temperature austenite phase (AP) and a low temperature martensite phase (MP). A drastic shift in the martensitic transition temperature at the rate of 16 K/T from 197 K to lower
more » ... ures was observed. A kinetic arrest phenomenon of the AP was observed in the magnetization and electrical resistivity measurements during field-cooled (FC) measurements at 5T. A metamagnetic behavior characterized by a jump in magnetization in the isothermal M(H) curves near T M was observed. The maximum value of the magnetic entropy change and refrigerant capacity at Curie temperature were found to be 5.5 Jkg -1 K -1 and 312 Jkg -1 for μoΔH = 5T, respectively. A large magnetoresistance value of -56% was found near the martensitic transition.
doi:10.1063/1.5130405 fatcat:p2jz2bwhzbcxjhelsmpv5fsfke