Measurements of higher harmonics of the ac voltage response in YBCO thin film
strips under low amplitude and low frequency harmonic excitation, as a function of
temperature, show a non linear response of the conductivity in the superconducting transition
interval. The third and fifth harmonics of the local voltage as a function of T exhibit a peak
near Tc and their amplitudes seem to be closely related to the T-derivative of the first
harmonic. The peaks are linearly dependent on the current amplitude and do not depend on
frequency. The observed data are partially interpreted in terms of ac current induced thermal
modulation of the sample temperature added to strong thermally activated fluctuations in the
transition region. The fit of the model to the data gives information of some sample properties
such as zero temperature critical current, zero onset resistance and thermal boundary
conductance.
| Identifer | oai:union.ndltd.org:DRESDEN/oai:qucosa:de:qucosa:80083 |
| Date | 22 July 2022 |
| Creators | Ossandón, J.G., Giordano, J.L., Esquinazi, Pablo, Kempa, K., Schaufuss, U., Sergeenkov, S. |
| Publisher | Institute of Physics Publishing |
| Source Sets | Hochschulschriftenserver (HSSS) der SLUB Dresden |
| Language | English |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, doc-type:article, info:eu-repo/semantics/article, doc-type:Text |
| Rights | info:eu-repo/semantics/openAccess |
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