Magneto- and electroresistance of La0.7Sr0.3MnO3/Nb(1.0%):SrTiO3 junctions

J. Appl. Phys. 105, 07C918 (2009)

Y. F. Chen and M. Ziese


The current-voltage characteristics and magnetotransport properties ofLa0.7Sr0.3MnO3/Nb(1.0%):SrTiO3 junctions under various currents ranging from 10−6 to10−3 A and different temperatures ranging from 10 to 300 K were investigated. The current-voltage curves exhibit rectifying behavior. The resistance, magnetoresistance, and electroresistance of the junctions are strongly dependent on bias-current direction, current, temperature, and magnetic field. A detailed analysis of the conductance-voltage curves showed that quantum mechanical tunneling was the dominating transport mechanism.