Abstract
The magnetocaloric and thermomagnetic properties of Ni50Mn35(In1−xCrx)15 and (Mn1−xCrx) NiGe1.05 systems for 0 ≤ x ≤ 0.105 and 0 ≤ x ≤ 0.1, respectively, have been studied by x-ray diffraction, differential scanning calorimetry, and magnetization measurements. Partial substitution of Cr for Mn in (Mn1−xCrx)NiGe1.05 results in a first order magnetostructural transition from a hexagonal paramagnetic to an orthorhombic paramagnetic phase near TM ∼ 380 K (for x = 0.07). Partial substitution of Cr for In in Ni50Mn35(In1−xCrx)15 shifts the magnetostructural transition to a higher temperature (T = TM ∼ 450 K) for x = 0.1. Large magnetic entropy changes of ΔS = −12 (J/(kgK)) and ΔS = −11 (J/(kgK)), both for a magnetic field change of 5 T, were observed in the vicinity of TM for (Mn1−xCrx)NiGe1.05 and Ni50Mn35(In1−xCrx)15, respectively.
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