Polycrystalline ingots with a nominal composition of Ni45Mn50−xInxCo5 (x = 13.6, 13.8, 14.0) (at.%) were prepared by arc melting under an argon atmosphere. The ingots were cut into small pieces with approximate dimensions of 3 × 3 × 5.5 mm3; the cut specimens were subsequently homogenized at 1173 K for 24 h in a vacuum and then quenched in water. Magnetization versus temperature curves were recorded using a superconducting quantum interference device (SQUID, Quantum Design).
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