Abstract
Magnetocaloric effect in nanopowders of Pr0.67Ca0.33Fe x Mn1−x O3 (x=0,0.1,0.3,0.4), in the vicinity of magnetic phase transitions, was investigated. It is shown that Pr0.67Ca0.33MnO3 exhibits the largest magnetic entropy change (ΔS M ) of 0.61 J/kg/K at 208 K upon 0.5 T magnetic field variation. Furthermore, the ΔS M distribution of the Pr0.67Ca0.33Fe x Mn1−x O3 is much more uniform than that of gadolinium. Because of these results, nanopowders of Pr0.67Ca0.33Fe x Mn1−x O3 have some potential applications for magnetic refrigerants in an extended high-temperature range. Moreover, it can be used as a working material of an apparatus based on the active magnetic regenerator cycle that cools hydrogen gas.
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Hamad, M.A. Magnetocaloric Effect in Nanopowders of Pr0.67Ca0.33Fe x Mn1−x O3 . J Supercond Nov Magn 27, 223–227 (2014). https://doi.org/10.1007/s10948-013-2244-y
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DOI: https://doi.org/10.1007/s10948-013-2244-y