Abstract
The magnetocaloric proprieties of Ba2Fe1−x Cr x MoO6 (cubic, Fm3m) have been investigated. With the help of the phenomenological model, the temperature dependences of the magnetization for Ba2Fe1−x Cr x MoO6 (0 ≤ x ≤ 1) in a 1 T magnetic field were simulated. The behavior of the temperature-dependent magnetocaloric effect was investigated in the vicinity of magnetic phase transitions. The magnetic entropy change and the specific heat were obtained. The values of the maximum magnetic entropy change, the full width at half maximum, and the relative cooling power for a change in the magnetic field of 1 T were calculated. The values and the shapes of −ΔS M and −ΔC p strongly depended on the Cr concentration. As x was increased, the maximum values of −ΔS M and −ΔC p decreased and the peaks of −ΔS M and −ΔC p became broader. The magnetocaloric effect of this material is large and tunable, suggesting a possible technical application of the material at moderate magnetic fields at temperatures near room temperature. For Ba2Fe1−x Cr x MoO6, the magnetic entropy change was shown to follow a master curve behavior.
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M’nassri, R., Cheikhrouhou, A. Magnetocaloric properties in ordered double-perovskite Ba2Fe1−x Cr x MoO6 (0 ≤ x ≤ 1). Journal of the Korean Physical Society 64, 879–885 (2014). https://doi.org/10.3938/jkps.64.879
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DOI: https://doi.org/10.3938/jkps.64.879