Fabrication of High Tc 2223 (Bi, Pb)SrCaCuO Single-Phase Films by Single-Target RF Magnetron Sputtering and Postannealing
- 1 May 1990
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 29 (5A) , L775
- https://doi.org/10.1143/jjap.29.l775
Abstract
Single-phase 2223 Bi(Pb)-Sr-Ca-Cu-O superconducting films with T czero above 100 K were reproducibly obtainable by single-target (Bi20Pb3Sr16Ca25Cu36O z ) rf magnetron sputtering on (100) MgO and postannealing. During annealing, the films were placed face-down on top of bulk material with different Pb contents. It was found that the optimal conditions for the annealing of 600-nm-thick films to obtain the aingle 2223 phase were 845°C for 12 to 14 hours on top of bulk Bi19.5Pb3.5Sr22Ca22Cu33O z bulk. The thinner the film was, the shorter was the optimal annealing time, at the expense of broadened T c transition.Keywords
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