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Growth of superconducting and non-superconducting whiskers in the Bi-Sr-Ca-Cu-O (BSCCO) system

Published online by Cambridge University Press:  01 December 2005

P. Badica*
Affiliation:
Institute for Materials Research, Tohoku University, Aoba-ku, Sendai, 980-8577 Japan; and National Institute of Materials Physics, Bucharest-Magurele, 077125, POB MG-7, Romania
K. Togano
Affiliation:
Institute for Materials Research, Tohoku University, Aoba-ku, Sendai, 980-8577 Japan; and National Institute for Materials Science, Tsukuba, 305-0047 Japan
*
a)Address all correspondence to this author. e-mail: p.badica@imr.tohoku.ac.jp
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Abstract

Growth of such non-superconducting whiskers [Sr2.24Ca0.4Al2Ox, (Ca0.8–0.85Sr0.15–0.1)2CuO3,CuO, or Bi2.44Sr2Ca1.3–2Cu6.9–9.95Al0.35–0.46Ox (Cu-rich whiskers)] formed during the growth of Bi-2212 superconducting whiskers from powder or glassy substrates, is discussed. These whiskers are likely to grow from the bottom end, and there is a tight relationship with the growth of the Bi-2212 whiskers. A general reaction-path model for the whisker growth in the BSCCO system, independent of the type of the catalytic impurity and substrate, is proposed. When whiskers are grown under magnetic fields, up to 10 T, changes in the whisker size, aspect ratio, and morphology are observed.

Type
Articles
Copyright
Copyright © Materials Research Society 2005

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References

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