The investigation of reversible strain and polarization effect in (011)-La0.9Ba0.1MnO3 film using field effect configuration

We have investigated the influence of the electric bias field on the magnetic and transport properties of (011)-oriented La0.9Ba0.1MnO3 (LBMO) thin film epitaxially grown on (011)-0.7Pb(Mg1/3Nb2/3)O-3-0.3PbTiO(3) (PMN-PT) single crystal substrate. It was found that strain and polarization effects induced by electric bias coexist in the whole temperature range and both of them can modulate the transport properties of (011)-LBMO on PMN-PT. The relative change of resistance Delta R/R exhibits peak values of -22% and -32% for bias fields of +12 and -12 kV/cm, respectively, around metal-insulator transition temperature, T-MI. However, the sign of Delta R/R shows polarity dependence at temperature far below T-MI. Further careful analysis demonstrates that these two opposite behaviors can be ascribed to the different influence of strain and polarization effects on transport properties. (C) 2011 American Institute of Physics. [doi:10.1063/1.3545805]