Observation of a sharp lambda peak in the third harmonic voltage response of high-T superconductor thin films |
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| Authors: | N Chéenne T Mishonov JO Indekeu |
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| Institution: | (1) Laboratorium voor Vaste-Stoffysica en Magnetisme, Katholieke Universiteit Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium, BE;(2) Department of Theoretical Physics, Sofia University St. Kliment Ohridski, 5 J. Bourchier Blvd., 1164 Sofia, Bulgaria, BG |
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| Abstract: | In this paper, we report on the sharp peak observed in the third harmonic voltage response generated by a bias sinusoidal
current applied to several strips patterned in a YBa2Cu3O
7 - δ
thin film and in two La2-xSrxCuO4 thin films, when the temperature is close to the normal-superconductor transition. The lambda-shaped temperature dependence
of the third harmonic signal on the current characteristics is studied. Several physical mechanisms of third harmonic generation
are examined.
Received 13 November 2002 / Received in final form 21 February 2003 Published online 7 May 2003 |
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| Keywords: | PACS 74 25 Fy Transport properties (electric and thermal conductivity thermoelectric effects etc ) |
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