Abstract
Vortex phase diagrams have been studied on heavy-ion irradiated YBa2Cu3Oy films by the measurements of current-voltage (I-V) characteristics, resistance R and critical current density Jc as a function of magnetic field B parallel to the columnar defects. In the scaling analyses of the I-V data, we find the non-universal nature of the glass transition. The dynamic critical exponent z, which is almost constant at high fields, shows an anomalous peak and the glass transition line Tg(B) reveals an upturn behavior at B ∼ Bφ/3 with Bφ the matching field, where we also observe step-like behavior both in R(B) and Jc(B) curves. These results indicate the existence of a temperature-independent boundary in the B-T plane at which the dissipation mechanism changes.
Original language | English |
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Pages (from-to) | 593-597 |
Number of pages | 5 |
Journal | Physica C: Superconductivity and its applications |
Volume | 378-381 |
Issue number | PART 1 |
DOIs | |
Publication status | Published - 2002 Oct 1 |
Keywords
- Bose glass transition
- Columnar defects
- I-V characteristics
- Vortex glass transition
- YBaCuO films
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering