Comparison of the E-J characteristics of several YBa2Cu3O7−δ thin films
| Autor: | Ian Wooldridge, Davor Pavuna, Andrea Gauzzi, M. A. Howson, D.J.C. Walker |
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| Rok vydání: | 1996 |
| Předmět: |
Laser ablation
Materials science Condensed matter physics Plane (geometry) Energy Engineering and Power Technology Condensed Matter Physics Epitaxy Electronic Optical and Magnetic Materials Vortex Magnetic field Condensed Matter::Materials Science Condensed Matter::Superconductivity Perpendicular Electrical and Electronic Engineering Thin film Glass transition |
| Zdroj: | Physica C: Superconductivity and its Applications. 260:143-148 |
| ISSN: | 0921-4534 |
| DOI: | 10.1016/0921-4534(96)00116-5 |
| Popis: | The current-voltage characteristics of several YBa 2 Cu 3 O 7−δ thin films have been measured in a range of magnetic fields up to 4 tesla applied perpendicular to the plane with the current in the a - b plane. Two of these films were grown by laser ablation and one by ion beam sputtering. All of the films were c -axis aligned, epitaxial and grown on SrTiO 3 substrates. The behaviour exhibited by the ablated and sputtered films was found to be quite different. In the ablated sample it was found that the E - J characteristics, over a wide current range, were consistent with the critical scaling behaviour expected close to a continuous vortex-glass transition. In the sputtered sample finite size effects perpendicular to the plane and a relatively low critical current density play an important role in limiting the current range over which critical scaling consistent with a vortex glass transition is found to occur. |
| Databáze: | OpenAIRE |
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