Giant and isotropic low temperature magnetocaloric effect in magnetic semiconductor EuSe

We present the giant and isotropic magnetocaloric effect (MCE) in antiferromagnetic semiconductor EuSe. Near the transition temperature T _N 4.6 K, the maximum value of the magnetic entropy change (- Δ S m max) and the relative cooling power of EuSe for a field change of 5 T are evaluated to be 37.5 J kg^-1 K^-1 and 580 J kg^-1, respectively, based on the magnetization and specific heat data. The - Δ S m max value of EuSe obtained in this work is the largest among the low temperature (20 K) magnetic refrigerant materials reported so far, which is even larger than that of the best known room temperature giant MEC materials.