Effect of Direct Transport Current and Heat Treatment on Resistive Properties of Bismuth-Based Ceramic High-Temperature Superconducting Oxides of Various Compositions
| Autor: | E.A. Mughnetsyan, E.G. Zargaryan, V.S. Baghdasaryan, V.V. Harutunyan, A.G. Sarkisyan, S.K. Nikoghosyan |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Superconductivity
Resistive touchscreen Materials science Condensed matter physics chemistry.chemical_element Liquid nitrogen Condensed Matter Physics Atomic and Molecular Physics and Optics Bismuth Magnetic field chemistry Electrical resistivity and conductivity visual_art visual_art.visual_art_medium General Materials Science Ceramic Current (fluid) |
| Zdroj: | Solid State Phenomena. 200:267-271 |
| ISSN: | 1662-9779 |
| DOI: | 10.4028/www.scientific.net/ssp.200.267 |
| Popis: | The effect of direct transport current (I) and heat treatment on resistive properties of bismuth-based ceramic high-temperature superconducting oxides of various compositions is studied by temperature dependent resistivity (r) measurements at fixed points in the vicinity of liquid nitrogen temperature in the presence of Earth's uncompensated magnetic field. It is shown that the observed results are significantly dependent on the sample preparation and post-processing conditions as well as on the measurement temperature. The results obtained are interpreted within the framework of the theory of Josephson weak links modified under the impact of self magnetic field of the sample’s transport current. An attempt is also done to find an analogy between the dependence of the characteristic parameters on the transport current in the case of heat treatment and on the dose when the samples are irradiated by various types of ionizing radiation. |
| Databáze: | OpenAIRE |
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