Superconducting and magnetic properties of Bi2Sr2Ca1-xYxCu2Oy (0≦x≦1)

R. Yoshizaki, Y. Saito, Y. Abe, H. Ikeda

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66 Citations (Scopus)


The effect of substitution of Y atoms for Ca atoms has been studied in the Bi2Sr2Ca1-xYxCu2Oy compound system. For x<0.5, superconductivity is observed and its fractional volume is reduced with increasing x, though the transition temperature of about 85 K is maintained. For x≧0.5 samples, the electrical resistivity behavior can be well described by the three-dimensional variable range hopping conduction, indicating that the system is essentially insulating. In this range of x, magnetic susceptibility shows spin-glass-type cusp at 13 K in the heating process after zero-field cooling and an enhanced cusp at 11 K in the field-cooling process. In the temperature range above about 150 K the Curie-Weiss dependence holds well with a positive paramagnetic Curie temperature, which increases to 40 K with increasing x in the insulating region.

Original languageEnglish
Pages (from-to)408-412
Number of pages5
JournalPhysica C: Superconductivity and its Applications
Issue number5
Publication statusPublished - 1988 Jul 1


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