The noise characteristics of YBCO films with strong pinning
Igor A. Khrebtov (Vavilov State Optical Institute)
A. D. Tkachenko (Vavilov State Optical Institute)
K. V. Ivanov (Vavilov State Optical Institute)
B. Dam (Vrije Universiteit Amsterdam)
F. C. Klaassen (Vrije Universiteit Amsterdam)
J. M. Huijbregtse (Vrije Universiteit Amsterdam)
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Abstract
The noise characteristics of YBa2Cu3O7-x films prepared by the laser ablation technique on SrTiO3 substrates were studied. The epitaxial YBCO films possess a perfect structure and are characterized by a narrow superconducting transition, strong pinning, and a very small flicker noise. In the normal state, the 1/f noise increases with the dislocation density. The minimum noise level with a Hooge parameter of (2-3) × 10-6 was observed at a disc location density of 8-12 μm-2.
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