Large magnetocaloric effect in Sm0.52Sr0.48MnO3 in low magnetic field

Abstract

This letter reports on the magnetocaloric properties of Sm0.52Sr0.48MnO3 single crystal. A magnetic field of only 1T yields a change in the magnetic entropy by 5.9J∕(kgK) at TC (=124K), which is higher than those observed in several other perovskite manganites and rare earth alloys of comparable TC. This change originates from a sharp magnetization jump, associated with a first-order metamagnetic transition. Such a large change in entropy at a low magnetic field makes this material useful for magnetic refrigeration.