Correlation between magnetic hysteresis and magnetic relaxation in YBaCuO single crystals

Journal Article · Thu Feb 01 00:00:00 EST 1990 · Journal of Low Temperature Physics; (USA)

DOI:https://doi.org/10.1007/BF00686099· OSTI ID:6549646

Pust, L; Kadlecova, J; Jirsa, M; Durcok, S ^[1]

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1. Institute of Physics, Praha (Czechoslovakia)

The dependence of the magnetic moment m obtained from the hysteresis loops on the speed of the magnetic field sweep {dot H} = dH{sub ext}/dt is explained on the basis of Anderson's interpretation of the magnetic flux creep. In addition, a phenomenological model is suggested which predicts a linear dependence of m on In {vert bar}{dot H}{vert bar} with the slope {partial derivative}m/{partial derivative}In {vert bar}{dot H}{vert bar}, numerically equal to the relaxation rate {partial derivative}m/{partial derivative}In(t) from the usual magnetic relaxation. The model here presented also enables one to compare the critical state in the superconductor at a field sweep rate {dot H} with the critical state at some time t{sub eff} after a step change of H{sub ext}. The values of {dot H} analyzed in our experiments actually correspond to the critical state at times t{sub eff} between 0.04 and 4 sec after an imaginary large step change of H{sub ext}.

• OSTI ID: 6549646
• Journal Information: Journal of Low Temperature Physics; (USA), Vol. 78:3-4; ISSN 0022-2291
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
SUPERCONDUCTING COMPOSITES
MAGNETIC PROPERTIES
SUPERCONDUCTIVITY
BARIUM
CALCULATION METHODS
COPPER OXIDES
DATA ANALYSIS
EXPERIMENTAL DATA
HYSTERESIS
MAGNETIC MOMENTS
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MEASURING METHODS
YTTRIUM
ALKALINE EARTH METALS
CHALCOGENIDES
COMPOSITE MATERIALS
COPPER COMPOUNDS
DATA
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
INFORMATION
MATERIALS
METALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
360204* - Ceramics
Cermets
& Refractories- Physical Properties