Phase-sensitive measurements of nonlinearity in high-temperature superconductor thin films
| Autor: | Kenneth Leong, James C. Booth, R. Schwall, Donald C. DeGroot, J.A. Jargon, S.A. Schima |
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| Rok vydání: | 2005 |
| Předmět: |
Physics
Resistive touchscreen High-temperature superconductivity Condensed matter physics Phase (waves) Condensed Matter Physics Network analyzer (electrical) Electronic Optical and Magnetic Materials law.invention Vortex Nonlinear system law Condensed Matter::Superconductivity Electrical and Electronic Engineering Thin film Microwave |
| Zdroj: | IEEE Transactions on Applied Superconductivity. 15:1000-1003 |
| ISSN: | 2378-7074 1051-8223 |
| DOI: | 10.1109/tasc.2005.850169 |
| Popis: | We present new frequency-dependent measurements of both the magnitude and phase of the nonlinear response in superconducting thin films at microwave frequencies obtained using a large-signal network analyzer. Our measurements show that the nonlinear inductance dominates the nonlinear response in thin YBCO films at 76 K, and our analysis yields two current-density scales corresponding to the real and imaginary components of the nonlinear response. The current-density scale associated with the dominant inductive response likely results from intrinsic pair-breaking, while the current-density scale associated with the nonlinear resistive term is smaller than the expected value due to pair-breaking, and could originate from vortex motion or other extrinsic effects. |
| Databáze: | OpenAIRE |
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