Crystal growth of Bi2(Sr,Nd/Sm)2CuOy and their superconductivity

M. Kikuchi, M. Itou, H. Faqir, T. Atou, Y. Murakami, Y. Syono

Research output: Contribution to journalArticle

Abstract

Bi2Sr2-xLnxCuOy (Ln=Nd, Sm) was synthesized in the range of x=0.2-0.6 and a single phase was obtained in the range of x=0.3-0.6. A diamagnetic signal was observed for x=0.2-0.6 and the maximum Tc of 23 K for Nd3+ and 17 K for Sm3+ was obtained around x=0.5 and 0.4, respectively. Single crystals of Bi2Sr2-xLnxCuOy (Ln = Nd, Sm) were successfully grown by the self-flux method from the melt of stoichiometric composition. DTA was used to determine the thermal cycle. The as-grown crystal from the melt of Bi2Sr1.6Nd0.4CuOy was Bi2Sr1.6Nd0.4CuOy with dimensions over 2mm and exhibited superconductivity at Tc∼20K. The crystal growth of Bi2Sr2-xSmxCuOy was examined for the stoichiometric melt of Bi2Sr1.5Sm0.5CuOy. However, we could not observe single crystal with 2 2 0 1 structure. The crystal had 2 2 1 2 structure and showed no superconductivity.

Original languageEnglish
Pages (from-to)396-400
Number of pages5
JournalJournal of Crystal Growth
Volume229
Issue number1
DOIs
Publication statusPublished - Jul 2 2001
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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