Thickness dependent magnetotransport in ultra-thin manganite films

Details Thickness dependent magnetotransport in ultra-thin manganite films Thickness dependent magnetotransport in ultra-thin manganite films

1998-09-30

arxiv.org/abs/cond-mat/9809414v1

Physics

Condensed Matter

Materials Science

11 pages, 4 figures

Scientific paper

10.1063/1.124050

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 $\sim 30 \AA$ for films on NdGaO_3 and $\sim 50 \AA$ for films on LaAlO_3.

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