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The structural, magnetic and magnetocaloric properties of MnCrNiGeSi high-entropy alloy

The structural, magnetic and magnetocaloric properties of Mn20Cr14Ni33Ge25Si8 and Mn24Cr10Ni33Ge25Si8 high entropy alloys (HEAs) were investigated. The HEAs were prepared by arc melting method. The structural analysis indicates that the structure of HEAs is orthorhombic with Pnma space group. In magnetic measurements, the maximum saturation magnetization was found to be 56.7 A m2kg−1. The Curie temperature of HEAs is 361 and 387 K, respectively. The Curie temperature shifts to the high temperature, when 4% Mn is added, resulting the long-range orientation of the magnetic moments. The magnetic entropy change of Mn24Cr10Ni33Ge25Si8 is 3.6 Jkg−1K−1 at around 387 K. Consequently, Large magnetic entropy change is achieved with low hysteresis and soft magnetic property at high temperature.