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Microstructure and superconductivity of Bi-Sr-Ca-Cu-O/Bi-Sr-Cu-O multilayer thin films

Book ·
OSTI ID:82837
; ; ; ;  [1]
  1. Matsushita Electric Industrial Co., Ltd., Kyoto (Japan). Central Research Labs.
Epitaxially grown multi-layers of Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub y} (Bi-2212) and Bi{sub 2}Sr{sub 2}CuO{sub x} (Bi-2201) have been investigated referring to those microstructure and transport properties. Thin films have been prepared by a RF magnetron sputtering technique and laminated as the superconducting and non-superconducting layers. The samples have a variety of film thickness of each layer. The surface morphology, crystallization, diffusion and layered structures of these multi-layers were evaluated by TEM, AES, SIMS, STM-AFM and X-ray diffraction measurements. BSCO films exhibit normal conducting transport property even at 4.2 K. The superconducting properties such as a change of Tc, a broadening of the transition and anisotropy in those properties under magnetic field were discussed. Those results suggested that the structural and electronic condition in N-layer seriously affect the superconducting interlayer coupling between superconducting layers through non-superconducting layers.
OSTI ID:
82837
Report Number(s):
CONF-940142--; ISBN 0-8194-1452-2
Country of Publication:
United States
Language:
English