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|Type:||Artigo de periódico|
|Title:||Magnetic Field Dependent Quantum Flux Creep In Bi2sr2ca2cu3o10|
|Abstract:||We have performed magnetization-relaxation measurements as a function of temperature and magnetic field in bulk and powdered Bi2Sr2Ca2Cu3O10 compound samples. At low temperatures the quantum tunneling of Abrikosov vortices could be clearly observed as well as its T2 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. © 1994.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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