Effect of magnetic impurities on high-temperature superconductivity in La/sub 1. 85/Sr/sub 0. 15/CuO/sub 4/
Journal Article
·
· Phys. Rev. B: Condens. Matter; (United States)
We have investigated the effect of magnetic impurities on the two-dimensional high-T/sub c/ superconductor La/sub 1.85/Sr./sub 0.15/CuO/sub 4/ by replacing La with Nd. We find a decrease in T/sub c/ and dH/sub c//sub 2//dTchemically bond/sub =/ and an increase in the normal-state resistivity with increasing Nd content. We use the Werthamer, Helfand, and Hohenberg equations to derive the effect of an exchange field, magnetic polarization, nonmagnetic impurity scattering, and changes in the density of states on T/sub c/ and dH/sub c//sub 2//dTchemically bond/sub =/. We find no evidence of an exchange interaction between the magnetic moments and the conduction electrons. We explain the changes in the superconducting properties in terms of the van Hove singularity in the density of states near the Fermi level.
- Research Organization:
- Materials Science and Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439
- OSTI ID:
- 6197869
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 36:10; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Conference
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Fri May 01 00:00:00 EDT 1987
·
OSTI ID:5574064
Upper critical fields and high superconducting transition temperatures of La/sub 1. 85/Sr/sub 0. 15/CuO/sub 4/ and La/sub 1. 85/Ba/sub 0. 15/CuO/sub 4/
Journal Article
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Sun Mar 01 23:00:00 EST 1987
· Appl. Phys. Lett.; (United States)
·
OSTI ID:6973293
Determination of the upper critical field of the electron-doped superconductor Sm[sub 1. 85]Ce[sub 0. 15]CuO[sub 4[minus][ital y]] from resistive fluctuations
Journal Article
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Mon Nov 30 23:00:00 EST 1992
· Physical Review, B: Condensed Matter; (United States)
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OSTI ID:6957870
Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL FIELD
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
IMPURITIES
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MAGNETIC FIELDS
MAGNETORESISTANCE
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL FIELD
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
IMPURITIES
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MAGNETIC FIELDS
MAGNETORESISTANCE
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE