Rectifying property and magnetoresistance of manganite-stannate junctions

By employing the perovskite-structured stannates and manganites, p-La0.67Ca0.33MnO3/i-SrSnO3/n-La0.03Sr0.97SnO3 junctions were fabricated on SrTiO3(001) substrates by pulsed laser deposition technique. The current-voltage curves indicate an excellent rectifying property of the heterojunction in the measurement temperatures from 310 to 10 K. A crossover from negative to positive of magnetoresistance with bias voltage was observed, which was explained by the transport mechanism of diffused electrons.