Observation of critical scaling behavior in the ac impedance at the onset of superconductivity in a large magnetic field
Journal Article
·
· Physical Review Letters; (USA)
- IBM Research Division, Thomas J. Watson Research Center, Yorktown Heights, New York 10598 (US)
We have measured the ac impedance of Y-Ba-Cu-O thin films in a magnetic field of 0.55 T and in the frequency range from 100 kHz to 500 MHz. At the temperature of the dc vortex-glass transition but in the ac linear regime, we find scaling behavior of the impedance amplitude, {vert bar}{ital Z}{vert bar}{infinity}{omega}{sup 0.83}, and a frequency-independent phase {phi}=74{degree}. At higher temperatures, we find a crossover from a frequency-independent to a frequency-dependent impedance. This crossover frequency {Omega} varies with temperature like {Omega}{similar to}({ital T}{minus}{ital T}{sub {ital g}}){sup 5,8}. Within experimental error, all of these results are in excellent agreement with predictions for the ac impedance of the vortex-glass phase of a superconductor in a large magnetic field.
- OSTI ID:
- 5809852
- Journal Information:
- Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 66:20; ISSN PRLTA; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
DATA
ELECTRIC CONDUCTIVITY
ELECTRIC IMPEDANCE
ELECTRICAL PROPERTIES
EXPERIMENTAL DATA
FILMS
FREQUENCY DEPENDENCE
FREQUENCY RANGE
HIGH-TC SUPERCONDUCTORS
IMPEDANCE
INFORMATION
KHZ RANGE
KHZ RANGE 01-100
KHZ RANGE 100-1000
LOW TEMPERATURE
MAGNETIC FIELDS
MHZ RANGE
MHZ RANGE 01-100
MHZ RANGE 100-1000
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SCALING LAWS
SUPERCONDUCTING FILMS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
DATA
ELECTRIC CONDUCTIVITY
ELECTRIC IMPEDANCE
ELECTRICAL PROPERTIES
EXPERIMENTAL DATA
FILMS
FREQUENCY DEPENDENCE
FREQUENCY RANGE
HIGH-TC SUPERCONDUCTORS
IMPEDANCE
INFORMATION
KHZ RANGE
KHZ RANGE 01-100
KHZ RANGE 100-1000
LOW TEMPERATURE
MAGNETIC FIELDS
MHZ RANGE
MHZ RANGE 01-100
MHZ RANGE 100-1000
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SCALING LAWS
SUPERCONDUCTING FILMS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES