期刊
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
卷 372, 期 -, 页码 1075-1077出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0921-4534(02)00846-8
关键词
metalorganic chemical vapor deposition; BSCCO; intrinsic Josephson junctions; mesa structured; Bi-2212/2223 superlattice
We report on the successful preparation of intrinsic Josephson junctions on high-quality BSCCO thin films grown by MOCVD. The surface of as-grown films was very smooth with the roughness of the order of a half unit cell. Mesas were effectively structured on the grown films by the liquid-nitrogen-cooled dry etching method, A typical I-V characteristic in the c-axis direction of a BSCCO film shows the hysteresis and multiple resistive branches. The number of branches is consistent with that of junctions calculated from the height of a mesa structure. This indicates that BSCCO films consist of a series array of S(CuO2 layer)/I(SrO.BiO layers)/S(CuO2 layer) junction. The formation of stacked Josephson junctions was also confirmed by the temperature dependence and the magnetic field dependence of I-c. (C) 2002 Elsevier Science B.V. All rights reserved.
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