Non-linear dynamics in a superconductor glass

The authors present an investigation of the dynamical properties of a high T/sub c/ granular superconductor (a sintered pellet of YBCO) carried out in the temperature range characteristic of the critical transition undergone by the disordered network of Josephson-Junctions (JJ), connecting the super...

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Bibliographic Details
Main Authors: Giovannella, C., Lucchini, C., Lecuyer, B., Fruchter, L.
Format: Conference Proceeding
Language:English
Subjects:
360102 - Metals & Alloys- Structure & Phase Studies
360104 - Metals & Alloys- Physical Properties
656100 - Condensed Matter Physics- Superconductivity
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL TEMPERATURE
CRYSTAL STRUCTURE
DYNAMICS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
FOURIER ANALYSIS
GRAIN ORIENTATION
HIGH TEMPERATURE
JOSEPHSON JUNCTIONS
JUNCTIONS
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
MATERIALS SCIENCE
MECHANICS
MICROSTRUCTURE
NONLINEAR PROBLEMS
ORIENTATION
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PROBES
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
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Summary:The authors present an investigation of the dynamical properties of a high T/sub c/ granular superconductor (a sintered pellet of YBCO) carried out in the temperature range characteristic of the critical transition undergone by the disordered network of Josephson-Junctions (JJ), connecting the superconductor grains. By means of an a.c. susceptibility probe we have studied the influence that the variations of the intensity and the frequency of the a.c. probing field, as well as that of a superimposed d.c. field, have on the shape of the susceptibility curves. The Fourier analysis of the susceptibility signal has evidenced the pronounced non linear character of the intergranular dynamics, which presents astonishing similarities with that of the spin glasses.
ISSN:0018-9464
1941-0069
DOI:10.1109/20.42355