Abstract
The magnetocaloric effect (MCE) of quaternary intermetallic compound ErNiBC has been investigated by magnetization and heat capacity measurements. The compound undergoes a paramagnetic (PM) to ferromagnetic (FM) transition at TC~5K and the ground state of Er ion forms a Kramer's doublet state. The magnetic transition is found to be second order in nature. The maximum magnetic entropy change (−ΔSMmax) and adiabatic temperature change (ΔTadmax) of ErNiBC are 24.8J/kgK and 8.6K, respectively, for a magnetic field change of 0–50kOe, and the corresponding refrigerant capacity (RC) is 312J/kg.
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