Liquid Quenched Superconductor Ba-Y-Cu-O with T c,zero =88 K and AC Josephson Effect at 77 K

A superconducting Ba-Y-Cu-O with T c,zero =88 K was prepared by a liquid quenching method, in which the melt of nominal composition Ba 2 YCu 3 O 7-δ was first quenched and then the sample was annealed at 900°C for 48 h in air. AC Josephson effect was observed at 77 K in point-contacts made of the pr...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 1987-07, Vol.26 (7A), p.L1148
Main Authors: Komatsu, Takayuki, Imai, Kouji, Matusita, Kazumasa, Takata, Masasuke, Iwai, Yutaka, Kawakami, Akira, Kaneko, Yasuhisa, Yamashita, Tsutomu
Format: Article
Language:English
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Summary:A superconducting Ba-Y-Cu-O with T c,zero =88 K was prepared by a liquid quenching method, in which the melt of nominal composition Ba 2 YCu 3 O 7-δ was first quenched and then the sample was annealed at 900°C for 48 h in air. AC Josephson effect was observed at 77 K in point-contacts made of the present samples. This new method is applicable to the preparation of superconducting thin films, wires, tapes and superconduciting cavities.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.26.L1148