Abstract
A single-phased TbCo 3B 2 compound has been prepared by an arc-melting method. The magnetic properties and magnetocaloric effect (MCE) have been studied by the magnetization and heat capacity measurements. A large reversible magnetocaloric effect has been observed accompanied by a second-order phase transition at around Tb–Tb sublattice ordering temperature. The values of maximum magnetic entropy change ( − Δ S M max ) reach 4.9 and 10.3 J kg −1 K −1 for the field change of 2 and 7 T with no obvious hysteresis loss around 30 K, respectively. The corresponding maximum adiabatic temperature changes ( Δ T ad max ) are evaluated to be 4.0 and 8.6 K. The magnetic transition and the origin of large MCE in TbCo 3B 2 were discussed.
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