Interfacial room temperature magnetism and enhanced magnetocaloric effect in strained La0.66Ca0.34MnO3/BaTiO3 heterostructures

We present a modification of the magnetization and an electronic reconfiguration due to interfacial coupling between strain relaxed La0.66Ca0.34MnO3 and ultrathin BaTiO3 films using the magnetocaloric effect and photoemission electron microscopy at the Mn, Ti L-2,L-3 edges. The addition of a top BaTiO3 layer leads to strain-induced enhancement of the magnetocaloric effect in La0.66Ca0.34MnO3, due to the structural transitions in BaTiO3, and to room temperature ferromagnetism due to electronic reconfiguration at the interface.