Similar depression of {ital T}{sub {ital c}} by Zn and Ni impurities in 1:2:3 (Ca{sub 0.4}La{sub 0.6})(Ba{sub 1.35}La{sub 0.65})(Cu{sub 1{minus}{ital z}}{ital M}{sub {ital z}}){sub 3}O{sub {ital y}}
Journal Article
·
· Physical Review, B: Condensed Matter
- Department of Physics and Crown Center for Superconductivity, Technion, Haifa 32000 (Israel)
Substitution of {ital M}=Zn or Ni impurities in 1:2:3 (Ca{sub 0.4}La{sub 0.6})(Ba{sub 1.35}La{sub 0.65})(Cu{sub 1{minus}{ital z}}{ital M}{sub {ital z}}){sub 3}O{sub {ital y}} depresses {ital T}{sub {ital c}}{sup max} with almost equal effectiveness, i.e., {minus}9 and {minus}7 K/{percent}, respectively. (In YBCO, Zn is three times more effective in depressing {ital T}{sub {ital c}} than Ni.) In these impurity-containing materials, the dependence of thermopower on {ital T}{sub {ital c}}/{ital T}{sub {ital c}}{sup max} departs substantially from the universal behavior observed in other cuprates. There is no definite trend in the resistivity of these ceramic materials with impurity concentration {ital z}. Our results suggest pair breaking or weakening of the interaction at constant carrier density when {ital z} is increased. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 392067
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 18 Vol. 54; ISSN PRBMDO; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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