Magnetic entropy change of the layered perovskites La22xSr1+2xMn2O7
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Magnetocaloric properties of perovskite-type manganese oxides with double Mn-O layers of composition La2-2x Sr1+2x Mn2 O7 (x=0.33 and 0.4) have been investigated. A broad peak of magnetic entropy change (- SM) was observed at the Curie temperature. The shape of - SM is strongly dependent on the Sr concentration. In contrast to L n1-x Ax Mn O3 perovskites, the distinct curvilinear shape of - SM for perovskites with double Mn-O layers shows different magnetic mechanisms arising from magnetocrystalline anisotropy. 2005 American Institute of Physics.
Journal of Applied Physics
author list (cited authors)
Wang, A., Cao, G., Liu, Y., Long, Y. i., Li, Y., Feng, Z., & Ross, J. H