Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9841681 | Physica C: Superconductivity and its Applications | 2005 | 5 Pages |
Abstract
We present measurements of the time(t)-dependent component of the flux-flow voltage δV(t) about the average voltage in the vortex-liquid phase of a thin amorphous MoxSi1âx film. At low temperatures T, δV(t) due to the vortex motion is clearly visible and the distribution of δV(t) is asymmetric, indicative of large velocity and/or number fluctuations of driven vortices. This result is very similar to that which has been observed in the quantum-liquid phase of a thick film. The anomalous vortex motion for the thick and thin films is found to occur in nearly the same reduced-temperature regime. Also, we find that for the thin film the anomalous motion is visible only in the high-field regime. We suggest that vortex dynamics in the low-T liquid phase of thin and thick films is dominated by common physical mechanisms related to quantum effects.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
S. Okuma, M. Kobayashi, K. Kainuma, M. Morita,