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MA: Magnetismus

MA 22: Magnetische dünne Schichten III

MA 22.5: Talk

Thursday, March 27, 2003, 11:15–11:30, HSZ/04

Local Electronic Properties of Manganite Films Studied by STM/STS under Ambient Conditions — •Yunhui Xu, Pintu Das, Jiandong Wei, M. R. Koblischka, and Uwe Hartmann — Institute of Experimental Physics, University of Saarbrücken, 66041 Saarbrücken, Germany

Thin films of La0.67Sr0.33MnO3 and La0.67Ba0.33MnO3 were prepared by utilizing of the high-oxygen-pressure sputtering technique. All films show a significant magnetoresistive effect at room temperature. The respective transition temperatures of the films are obtained from R-T curves. The local electronic properties of the films have been studied by STM/STS under ambient conditions. Local states of spatially separated areas of low conductance and high conductance were carefully detected. The results serve for an understanding of the general electronic and magnetic properties of manganite films.