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MA: Magnetismus

MA 22: Magnetische dünne Schichten III

MA 22.3: Vortrag

Donnerstag, 27. März 2003, 10:45–11:00, HSZ/04

The strain effects on the physical properties of La_0.9Sr_0.1MnO₃ ultra-thin films — •Hui Zhang, Georg Cristiani, and Hanns-Ulrich Habermeier — Heisenbergstr.1, 70569 Stuttgart

In this paper, we studied systematically c oriented La_0.9Sr_0.1MnO₃ thin films under both tensile and compressive strains. The structural, transport and magnetic properties were investigated in detail. The results clearly show that with increasing c parameter, a-b plane was compressed simultaneously, and antiferro- magnetism with enhanced resistivity was established; in contrary, decreasing c-parameter caused ferromagnetism and metallicity. We attribute these abnormal behaviors to the competitions between double-exchange, orbital ordering and superexchange as well.