Thermally activated flux movement and critical transport current density in epitaxialBi2Sr2

Temperature and field dependence of thermally activated flux flow resistance in Bi2Sr2CaCu2O8+δ superconductor

“…Palstra et al [3] reported power law dependence U 0 α H -α on field, where as Kucera et al [7] suggested that U 0 α H -1/2 (1-T/T c ), where T c is the critical temperature for Bi-2212 thin films. The same relation was suggested by Wagner et al [8] for Bi-2212 thin films. In a recent report by Zhang et al [9], they suggested an empirical form U 0 α H -α(H) (1-…”

“…There are previous reports [7,8] in which T x (H) is reported to be constant (~ T c at H=0) and independent of magnetic field. But, Palstra et al [3] and Kim et al [10] proposed a magnetic field dependent T x (H) instead of T c .…”

Length-scale-dependent vortex-antivortex unbinding in epitaxialBi2Sr2CaCuMiu1, Jakob2, Haibach3 et al. 1998Phys. Rev. BSelf Cite13060View full textAdd to dashboardCite

“…20. The strongly c-axis-oriented growth and in-plane epitaxy were confirmed by x-ray-diffraction studies in a Bragg-Brentano and four circle geometry.…”

“…The supercurrent transport properties of the as-grown film ͑Bi-2212ag) were presented in some detail in Ref. 20. A second film (Bi-2212ox), prepared under the same conditions, was supplementary maintained at 600°C for 3 h in 1 kPa oxygen, for a better homogeneity of the oxygen distribution and a low degree of disorder.…”

Shift of the surface-barrier part of the irreversibility line due to columnar defects in Bi2Sr2CaCu2O8 thin films

“…They can not support undissipative current flow with large enough density. In crystals and films of Bi 2 Sr 2 CaCu 2 O 8 the critical current density is very low in a wide area of magnetic field and temperature, from ∼ 0.5T c to T c (see for example [1,2]). In this area the surface or edge barriers of different types can manifest themselves.…”