Control of Oxygen Deficiency in Superconductivity Y sub 1 Ba sub 2 Cu sub 3 O sub 7--y Films Using a Solid-State Electrolyte

Y sub 1 Ba sub 2 Cu sub 3 O sub 7--y (YBCO) films deposited on YSZ are coated with MgO films in order to isolate the YBCO film from the atmosphere. An electrochemical technique using a solid-state electrolyte is applied to this airtight structure to control the density of the oxygen deficiency y in...

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Published inJapanese Journal of Applied Physics, Letters Vol. 28; no. 8; pp. L1411 - L1414
Main Authors Yugami, H, Watanabe, T, Suemoto, T, Shin, S, Sobajima, S, Ishigame, M
Format Journal Article
LanguageEnglish
Published 01.08.1989
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Summary:Y sub 1 Ba sub 2 Cu sub 3 O sub 7--y (YBCO) films deposited on YSZ are coated with MgO films in order to isolate the YBCO film from the atmosphere. An electrochemical technique using a solid-state electrolyte is applied to this airtight structure to control the density of the oxygen deficiency y in the YBCO film. The resistivity of the YBCO film at 500 deg C is found to be reversibly changed by the applied current. The change of y by the applied current is confirmed by the change of the lattice parameter c. From the temperature dependence of the resistivity of the film, it is shown that T sub c could be controlled and fixed by using this technique. Graphs, Diffraction patterns. 12 ref.--AA
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ISSN:0021-4922