The observation of a transverse voltage at the superconducting transition of thin films

The authors have observed the occurrence of a nonHall transverse voltage in the absence of any externally applied magnetic field as a film is brought through its superconducting transition either by changing temperature or current. This voltage goes from zero to a maximum and then back to zero as th...

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Bibliographic Details
Published in:IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) 1991-03, Vol.27 (2), p.1039-1042
Main Authors: Francavilla, T.L., Hein, R.A.
Format: Article
Language:English
Subjects:
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Conductivity
CRITICAL CURRENT
CRYSTAL STRUCTURE
Current measurement
CURRENTS
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRIC POTENTIAL
ELECTRICAL PROPERTIES
Electrical resistance measurement
Electrodes
Exact sciences and technology
GRAIN ORIENTATION
Magnetic field measurement
MICROSTRUCTURE
MIXED STATE
Monitoring
ORIENTATION
PHYSICAL PROPERTIES
Physics
Superconducting films
Superconducting films and low-dimensional structures
Superconducting thin films
SUPERCONDUCTIVITY
Temperature
THERMODYNAMIC PROPERTIES 665411 > Basic Superconductivity Studies-- (1992-)
THIN FILMS
TRANSITION TEMPERATURE
Voltage measurement
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Summary:The authors have observed the occurrence of a nonHall transverse voltage in the absence of any externally applied magnetic field as a film is brought through its superconducting transition either by changing temperature or current. This voltage goes from zero to a maximum and then back to zero as the transition is traversed in either direction. A model that accounts for these observations has been published by L.I. Glazman (1986). The experimental functional dependence of V/sub T/ is in good qualitative agreement with Glazman's theoretical predictions. This suggests that vortex-antivortex interactions, present in the mixed state of all superconductors, may be the cause for the observed nonzero V/sub T/. An orientational effect consistent with flux guiding which affects the amplitude of the observed peak and provides all explanation for the variation in amplitude has been observed. It is suggested that reports of anomalous Hall effect and resistance anomalies in the literature may be related to this effect.
ISSN:0018-9464
1941-0069
DOI:10.1109/20.133356