Abstract
We report on measurements of the angular dependence of the irreversibility temperature (Formula presented) in (Formula presented) thin films, defined by the onset of a third-harmonic signal and measured by a miniature Hall probe. From the functional form of (Formula presented) we conclude that the origin of the irreversibility line in unirradiated films is a dynamic crossover from an unpinned to a pinned vortex liquid. In irradiated films the irreversibility temperature is determined by the trapping angle.
| Original language | English |
|---|---|
| Pages (from-to) | 15530-15536 |
| Number of pages | 7 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 54 |
| Issue number | 21 |
| DOIs | |
| State | Published - 1996 |