Current voltage (itI-V) curves CVD-YBa2Cu3O7-δ films near the glass transition temperature Tg in the mixed state are studied as a function of the angle θ between magnetic field andc axis. In the vortex-glass scaling analysis of I-V curves, it is found that the glass critical exponentsare independent of θ, and do not show a remarkable change even at θ=90°(H⊥c). Our results indicates that periodic plane-like intrinsic pinning is not so effective near Tg and vortices are pinned at the random point-like disorder for all field directions.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering