The magnetostructural transitions, magnetocaloric effects, and magnetoresistance properties of Ni45Mn43CrSn11 Heusler alloys were investigated using X-ray diffraction (XRD), field-dependent magnetization, and electrical resistivity measurements. A large inverse and direct magnetocaloric effect has been observed in Ni45Mn43CrSn11 across the martensitic and Curie transition temperature, respectively. The values of the latent heat (L = 15.5 J/g) and corresponding magnetic (∆SM) and total (∆ST) entropy changes (∆SM = 35 J/kg·K for ∆H = 5T and ∆ST = 39.7 J/kg·K) have been evaluated using magnetic and differential scanning calorimetry (DSC) measurements, respectively. A substantial jump in resistivity was observed across the martensitic transformation. A large negative magnetoresistance (~67%) was obtained at the magnetostructural transition for a field change of 5 T. The roles of the magnetic and structural changes on the transition temperatures and the potential application of Ni45Mn43CrSn11 Heusler alloys for refrigerator technology are discussed.
Publication Source (Journal or Book title)
Pandey, S., Quetz, A., Aryal, A., Dubenko, I., Mazumdar, D., Stadler, S., & Ali, N. (2017). Large inverse magnetocaloric effects and giant magnetoresistance in Ni-Mn-Cr-Sn heusler alloys. Magnetochemistry, 3 (1) https://doi.org/10.3390/magnetochemistry3010003