Flux dynamics and time effects in a carved out superconducting polycrystalline Bi-sr-ca-cu-o sample
Yükleniyor...
Dosyalar
Tarih
2006
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Iop Publishing Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Systematic slow transport relaxation (V-t curves) and magnetovoltage measurements (V-H curves) have been carried out in a carved out superconducting polycrystalline Bi-Sr-Ca-Cu-O sample as a function of current (I), temperature (T), and external field (H). The V-t curves reveal the details of the time evolution of the penetrated state within the granular structure of the sample and also give a direct evidence of the relaxation of the flux trapped inside the drilled hole on the time scale of the experiment. On the other hand, V-H curves exhibit several unusual interesting properties upon cycling of the external magnetic field in forward and reverse directions, and, in addition to irreversibilities, strong reversible effects are observed, which is associated with the trapping of the macroscopic flux bundles in the drilled hole. It is also observed that the field sweep rate influences dramatically the reversible and irreversible behavior of V-H curves. The experimental results were mainly interpreted in terms of current and field induced organization of the vortices.
Açıklama
7th European Conference on Applied Superconductivity -- SEP 11-15, 2005 -- Vienna Univ Technol, Vienna, AUSTRIA
Anahtar Kelimeler
Superconducting, Polycrystalline, Flux Dynamics, Effects
Kaynak
7Th European Conference On Applied Superconductivity (Eucas'05)
WoS Q Değeri
N/A
Scopus Q Değeri
N/A
Cilt
43
