Magnetic field dependent quantum flux creep in Bi2Sr2Ca2Cu3O10

✍ Scribed by S. Moehlecke; Y. Kopelevich

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 571 KB
• Volume: 222
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(94)90125-2

✦ Synopsis

We have performed magnetization-relaxation measurements as a function of temperature and magnetic field in bulk and powdered Bi2Sr2Ca2Cu3Olo compound samples. At low temperatures the quantum tunneling of Abrikosov vortices could be clearly observed as well as its T 2 thermally assisted temperature dependence. The tunneling rate is observed to increase with the applied magnetic field reflecting the reduction of the collective pinning length. When the 3D-to-2D dimensional crossover of the vortex ensemble occurs both the pinning length and the tunneling rate saturate.