Current-voltage characteristics and quasi-two-dimensional vortex-glass transition in epitaxial Bi2Sr2Ca2Cu3Ox films

✍ Scribed by H. Yamasaki; K. Endo; S. Kosaka; M. Umeda; S. Yoshida; K. Kajimura

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 961 KB
• Volume: 35
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/0011-2275(95)90831-y

✦ Synopsis

The existence of a quasi-two-dimensional vortex-glass-liquid transition has been demonstrated in the scaling analysis of non-linear current-voltage characteristics in epitaxial Bi,Sr,Ca,Cu,O, films in magnetic fieids applied parallel to the c-axis. In the vortexglass regime below the vortex-glass-liquid transition temperature Tg, the linear resistivity Plin = (E/J) +,, appears to vanish, while in the vortex-liquid regime the IogE versus IogJ curve shows systematic upward curvature and a finite linear resistivity is observed. At Tg o power-law relation E = P5 is seen. The irreversibility fields BIG determined by transport measurements are much higher than the vortex-glass transition fields B!, implying that finite critical current densities are defined by conventional criteria In the pinned vortex-liquid regime.