A study of vortex motion in YBa2Cu3Ox thin films as revealed by the simultaneous appearance of longitudinal and transverse voltages

Authors carried out simultaneous measurement of longitudinal and transverse voltages generated when a YBa2Cu3Ox thin film is subjected to magnetic field (B) at an angle q to current (I), with both B and I parallel to the ab-plane. Measurements were made as a function of current and temperature both...

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Bibliographic Details
Published in:Physica. C, Superconductivity Superconductivity, 2001-11, Vol.363 (2), p.140-148
Main Authors: Gupta, S.K., Sen, S., Muthe, K.P., Vyas, J.C., Aswal, D.K., Gonal, M.R., Viswanadham, C.S., Goswami, G.L., Sahni, V.C.
Format: Article
Language:English
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Summary:Authors carried out simultaneous measurement of longitudinal and transverse voltages generated when a YBa2Cu3Ox thin film is subjected to magnetic field (B) at an angle q to current (I), with both B and I parallel to the ab-plane. Measurements were made as a function of current and temperature both above and below the vortex Tg. These studies have been helpful to differentiate between dissipation caused by vortex motion in the direction of the Lorentz force and that caused by other mechanisms. Results show that the dissipation caused by the Lorentz force has two components. Both the components show power law behavior. The first component increases sharply with the current and is attributed to vortex motion in the direction of the Lorentz force. The second component has been attributed to vortex motion induced thermodynamical fluctuations in the order parameter. 25 refs.
ISSN:0921-4534
DOI:10.1016/S0921-4534(01)00626-8