SURFACE MORPHOLOGY AND TRANSPORT PROPERTY INLa2/3Ca1/3MnO3,YBa1.8Eu0.2Cu3O7PERIODIC FILMS

Y. M. Zhang, Z. S. Jiang, X. S. Wu (), W. S. Tan and J. Gao
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Y. M. Zhang: Lab of Solid State Microstructures, Department of Physics, Nanjing University, Nangjing 210093, China
Z. S. Jiang: Lab of Solid State Microstructures, Department of Physics, Nanjing University, Nangjing 210093, China
X. S. Wu: Lab of Solid State Microstructures, Department of Physics, Nanjing University, Nangjing 210093, China
W. S. Tan: Department of Applied Physics, Nanjing University of Science & Technology, Nanjing 210094, Nanjing, China
J. Gao: Department of Physics, The University of Hong Kong, Pokflam Road, Hong Kong, China

Surface Review and Letters (SRL), 2007, vol. 14, issue 04, 841-844

Abstract: The structure and transport properties forLa2/3Ca1/3MnO3(LCMO)/YBa1.8Eu0.2Cu3O7(YBECO) multilayers are studied. The lattice constants for each sub-layer decrease with decreasing the temperature. The morphology of the films depends on the thickness of each sub-layer. Grains growing on the surface of each sample are believed to release the lattice strain. We believe that the lattice strain may affect the transport properties of LCMO and YBECO in the periodic films. The grains appearing on the surface of the film may enlarge the width of the superconducting transition of YBECO, and the metal-to-insulator transition of LCMO.

Date: 2007
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DOI: 10.1142/S0218625X07010147

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