Abstract
In the present work, the magnetic entropy change of the half-doped Nd 0.5Ca 0.25Sr 0.25MnO 3 manganite has been investigated. The measurement of isothermal magnetization around Curie temperature reveals the maximum isothermal magnetic entropy change of 1.85 and 0.77 J/kg K for Δ H = 3.0 and 1.0 T magnetic field variation, respectively. In addition, from the data of heat capacity, we find the adiabatic temperature change of 0.88 K for a magnetic field variation of 3.0 T. Though only a moderate magnetic entropy change and a small adiabatic temperature change were obtained, a considerable large relative cooling power (140 J/kg as Δ H = 3.0 T ) and a wide temperature range (74 K as Δ H = 3.0 T ) were found in this sample, this ensure it to be a promising candidate for the actual magnetic refrigerant materials.
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