Modulation-free bismuth-lead cuprate superconductors: BiPbSr sub 1+ x L1 minus x CuO sub 6 and BiPbSr sub 2 Y sub 1 minus x Ca sub x Cu sub 2 O sub 8

Journal Article · Mon Apr 01 00:00:00 EST 1991 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.43.8686· OSTI ID:5689812

Manivannan, V; Gopalakrishnan, J; Rao, C N.R. ^[1]

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1. Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore, 560 012, India (IN)

Modulation-free BiPbSr{ital L}CuO{sub 6} ({ital L}=La, Pr, Nd) and BiPbSr{sub 2}YCu{sub 2}O{sub 8}, which are isotypic with the {ital n}=1 and 2 members of the Bi{sub 2}Sr{sub 2}Ca{sub {ital n}{minus}1}Cu{sub {ital n}}O{sub 2{ital n}+4} family, have been prepared and characterized. These parent compounds are nonsuperconducting, but when doped with holes by substitution chemistry give modulation-free superconducting cuprates of the general formulas BiPbSr{sub 1+{ital x}L1{minus}{ital x}}CuO{sub 6} and BiPbSr{sub 2}Y{sub 1{minus}{ital x}}Ca{sub {ital x}}Cu{sub 2}O{sub 8}, exhibiting maximum {ital T}{sub {ital c}}'s of 24 and 85 K, respectively. Significantly, the hole concentration at the maximum {ital T}{sub {ital c}} is 0.12 in the cuprate family with a single Cu-O layer and 0.22 in that with two Cu-O layers.

• OSTI ID: 5689812
• Journal Information: Physical Review, B: Condensed Matter; (USA), Vol. 43:10; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BISMUTH OXIDES
SUPERCONDUCTIVITY
COPPER OXIDES
LANTHANUM OXIDES
LEAD OXIDES
NEODYMIUM OXIDES
PRASEODYMIUM OXIDES
STRONTIUM OXIDES
YTTRIUM OXIDES
HOLES
MODULATION
SYNTHESIS
TRANSITION TEMPERATURE
ALKALINE EARTH METAL COMPOUNDS
BISMUTH COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
LANTHANUM COMPOUNDS
LEAD COMPOUNDS
NEODYMIUM COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PRASEODYMIUM COMPOUNDS
RARE EARTH COMPOUNDS
STRONTIUM COMPOUNDS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties