Abstract
We report the magnetocaloric effect in the metamagnetic compound Gd2In obtained from magnetization measurement. Gd2In was previously reported to have two magnetic transitions: (i) a paramagnetic to ferromagnetic transition below 190K and (ii) a ferromagnetic to an antiferromagnetic state below 105K. The low temperature antiferromagnetic state is unstable under an applied magnetic field and undergoes metamagnetic transition to a ferromagnetic like state. We observe conventional positive magnetocaloric effect (the magnetic entropy change, ΔSM<0) around 190K at all applied fields. The magnetocaloric effect is found to be inverse (negative) at low fields around 105K (ΔSM>0), however it turns positive at higher fields (ΔSM<0). The observed anomaly is found to be related to the field induced transition which drives the system from an antiferromagnetic to a ferromagnetic state.
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