Magnetic entropy change of the layered perovskites La2−2xSr1+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 (-Δ SM) was observed at the Curie temperature. The shape of -Δ SM is strongly dependent on the Sr concentration. In contrast to L n1-x Ax Mn O3 perovskites, the distinct curvilinear shape of -Δ SM for perovskites with double Mn-O layers shows different magnetic mechanisms arising from magnetocrystalline anisotropy. © 2005 American Institute of Physics.
author list (cited authors)
Wang, A., Cao, G., Liu, Y., Long, Y. i., Li, Y., Feng, Z., & Ross, J. H.