Two successive magnetic transitions induced large refrigerant capacity in HoPdIn compound

Magnetic properties and magnetocaloric effect (MCE) in HoPdIn have been studied by magnetization and heat capacity measurements. The compound undergoes two successive magnetic transitions at 6 K and 23 K, and resulting two peaks in the temperature dependence of magnetic entropy change curves, -ΔS _M (T). Two peaks are partly overlapping and induced a large refrigerant capacity (RC). For a field change of 0-7 T, the peak values of -ΔS_M are 17.7 J/kg K around T_C and 10.0 J/kg K around T_M, with a large RC value of 635 J/kg. The large reversible MCE and RC indicate that the HoPdIn could be a promising candidate for low temperature magnetic refrigeration.