Thickness dependent magnetotransport in ultra-thin manganite films

Abstract

To understand the near-interface magnetism in manganites, uniform, ultra-thin films of La_{0.67}Sr_{0.33}MnO_3 were grown epitaxially on single crystal (001) LaAlO_3 and (110) NdGaO_3 substrates. The temperature and magnetic field dependent film resistance is used to probe the film's structural and magnetic properties. A surface and/or interface related dead-layer is inferred from the thickness dependent resistance and magnetoresistance. The total thickness of the dead layer is estimated to be $\sim 30\mathring{A}$ for films on NdGaO_3 and $\sim 50\mathring{A}$ for films on LaAlO_3.

11 pages, 4 figures

References in corpus (1)

• Thin-Film Trilayer Manganate Junctions

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