Gd induced modifications in the magnetocaloric properties of dysprosium manganites

Abstract We report structural, electronic, magnetic, and magnetocaloric studies of polycrystalline DyMnO3 and its A-site Gd substituents, Dy1−xGdxMnO3, where 0 ≤ x ≤ 1. Detailed comparison of various magnetocaloric parameters shows that Dy0.5Gd0.5MnO3 has the best values with a large isothermal magnetic entropy change, − ∆ S m max ~ 15.35 J/kg K, adiabatic temperature change, ∆ T ad max ~ 6.15 K and relative cooling power, RCP ~ 307 J/kg, suggesting that rare earth mixing plays a vital role in enhancing the magnetocaloric properties. In addition, absence of magnetic and thermal hysteresis also makes it one of the best candidates for magnetic refrigeration among all known potential candidates for cryogenic temperature applications.