Magnetovoltage measurements and field sweep rate dependence of V-H curves in superconducting polycrystalline Y(1)Ba(2)Cu(3)O(7-x)
Yükleniyor...
Dosyalar
Tarih
2006
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Iop Publishing Ltd
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Magnetovoltage measurements (V-H curves) were carried out in superconducting polycrystalline bulk Y(1)Ba(2)Cu(3)O(7-x) (YBCO) material as a function of current (I), temperature (T), field sweep rate (dH/dt) and field orientation with respect to the transport current. A relative decrease in the dissipation measured in V-H curves was observed as dH/dt is increased, which implies that the time spent to plot the whole cycle has an importance on the evolution of the V-H curves. Thus, it could be possible to observe the relaxation effects in magnetovoltage measurements. In addition, the several significant steps and plateaus in V-H curves evolve depending on the magnitude of the transport current and also dH/dt. These observations were attributed to locking of the flux lines to decrease or increase in size of the easy motion flow channels. The strong hysteresis effects in V-H curves were discussed mainly by means of the flux trapping within the granularity of sample and the different degree of the inhomogeneous flux motion with respect to the sweeping of the external magnetic field up and down.
Açıklama
7th European Conference on Applied Superconductivity -- SEP 11-15, 2005 -- Vienna Univ Technol, Vienna, AUSTRIA
Anahtar Kelimeler
Magnetovoltage Measurements, Superconducting, Polycrystalline, Rate Dependence
Kaynak
7Th European Conference On Applied Superconductivity (Eucas'05)
WoS Q Değeri
N/A
Scopus Q Değeri
N/A
Cilt
43
