Phase Transitions and Magnetocaloric Effects in Ni₅₀Mn₃₅In₁₂Bi₃ and Ni₄₇Mn₃₅In₁₅Bi₃Heusler Alloys

The Ni₅₀Mn₃₅In₁₂Bi₃ and Ni₄₇Mn₃₅In₁₅Bi₃ belongs to Heusler alloys family: X₂YZ (where X and Y are typically transition elements or lanthanides while Z atom is from group III or IV) and attracted much interest because of their magnetic and transport properties. The structural, magnetic, magnetocaloric and magnetotransport properties of Ni₅₀Mn₃₅In₁₂Bi₃ and Ni₄₇Mn₃₅In₁₅Bi₃ has been studied using room-temperature X-ray diffraction (XRD), and magnetization measurements. The results of these measurements will be presented. The Ni₄₇Mn₃₅In₁₅Bi₃ shows magnetocaloric effects in the vicinity of its magnetostructural transition (MST) and it’s Curie temperature (T_c=291K) at 100 Oe filed. Magnetic entropy change and magnetoresistance has been calculated for these alloys and will be presented.