Temperature and field dependence of the critical current densities of Y-Ba-Cu-O films
Journal Article
·
· Appl. Phys. Lett.; (United States)
We have prepared thin films of Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7-//sub x/ using a coevaporation technique and measured their critical current densities as a function of both temperature and field using a transport technique. For a stoichiometric composition we find that J/sub c/ at 4.2 K in zero field is 1.04 x 10/sup 6/ A/cm/sup 2/ and does not drop below 10/sup 5/ A/cm/sup 2/ until T>60 K. Fitting the data near T/sub c/ shows that J/sub c/ follows a power law of (1-t), with t being the reduced temperature. In an applied field perpendicular to the film's surface, J/sub c/ also drops slowly, and up to 90 kOe J/sub c/ >10/sup 5/ A/cm/sup 2/ for T = 4.2 K. Measurements for an off-stoichiometric film, Y/sub 1/Ba/sub 3/Cu/sub 2/O/sub 7-//sub x/, give lower J/sub c/ values that fall off faster in temperature than for stoichiometric compositions.
- Research Organization:
- Naval Research Laboratory, Washington, DC 20375-5000
- OSTI ID:
- 6933858
- Journal Information:
- Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 53:14; ISSN APPLA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Critical current density measurements of thin films of YBaCuO
Effect of compositional variation and annealing in oxygen on superconducting properties of Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 8-//sub y/
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Conference
·
Tue Feb 28 23:00:00 EST 1989
· IEEE Trans. Magn.; (United States)
·
OSTI ID:6086230
Effect of compositional variation and annealing in oxygen on superconducting properties of Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 8-//sub y/
Journal Article
·
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· Phys. Rev. B: Condens. Matter; (United States)
·
OSTI ID:6511775
Reproducibility of transition temperature and critical current density of thin films of YBa sub 2 Cu sub 3 O sub 7 on (100) LaAlO sub 3
Journal Article
·
Thu Jan 31 23:00:00 EST 1991
· Journal of Superconductivity; (United States)
·
OSTI ID:7253361
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
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CURRENTS
ELECTRIC CURRENTS
ELECTROMAGNETIC FIELDS
EVAPORATION
FILMS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
STOICHIOMETRY
SUPERCONDUCTING FILMS
TEMPERATURE EFFECTS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
VACUUM EVAPORATION
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL CURRENT
CURRENTS
ELECTRIC CURRENTS
ELECTROMAGNETIC FIELDS
EVAPORATION
FILMS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
STOICHIOMETRY
SUPERCONDUCTING FILMS
TEMPERATURE EFFECTS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
VACUUM EVAPORATION
YTTRIUM COMPOUNDS
YTTRIUM OXIDES