Effect of Schottky barrier on the transport property in perovskite oxide heterostructures

Abstract The transport processes in the heterostructures of La 0.7 Sr 0.3 MnO 3 / BiFeO 3 and La 0.9 Sr 0.1 MnO 3 / SrNb 0.01 Ti 0.99 O 3 have been studied theoretically by taking into account the effect of Schottky barrier formed at the contact of the electrode. By comparing with the experimental data, it is found that the physical origin for the symmetry of the measured I – V curves in the heterostructures of La 0.7 Sr 0.3 MnO 3 / BiFeO 3 can be attributed to the effect of the Schottky contact diodes. It is also found that the influence of Schottky barrier on the transport properties of La 0.9 Sr 0.1 MnO 3 / SrNb 0.01 Ti 0.99 O 3 heterostructures increases with the increased temperature and decreases with the increased doping density of SrNb 0.01 Ti 0.99 O 3 layer at temperature above the Curie temperature of La 0.9 Sr 0.1 MnO 3 based on our calculation.