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Title: Substitution of 3 d metals for Cu in Bi sub 2 (Sr sub 0. 6 Ca sub 0. 4 ) sub 3 Cu sub 2 O sub y

Journal Article · · Physical Review, B: Condensed Matter; (USA)
; ; ; ;  [1]
  1. Department of Applied Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113, Japan (JP)

The effect of the substitution of 3{ital d} metals (Fe, Co, Ni, and Zn) for Cu in a high-temperature superconductor Bi{sub 2}(Sr,Ca){sub 3}Cu{sub 2}O{sub {ital y}} was investigated by measuring lattice constants, dc resistivity, Hall effect, and magnetic susceptibilities in normal and superconducting phases. For all kinds of impurities, within the composition range where the single-phase samples are synthesized, the superconducting transition temperature {ital T}{sub {ital c}} was found to decrease with increasing impurity concentration. Even nonmagnetic Zn was found to decrease {ital T}{sub {ital c}}, as well as, magnetic Fe, Co, and Ni, without changing the hole concentration. These behaviors cannot be explained by the Abrikosov-Gorkov theory for conventional BCS superconductors. Possible explanations are discussed.

OSTI ID:
6861217
Journal Information:
Physical Review, B: Condensed Matter; (USA), Vol. 41:7; ISSN 0163-1829
Country of Publication:
United States
Language:
English