Analytic solution of the critical-state model for an elliptical cylinder with field-dependent critical current density

1991 ◽  
Vol 44 (13) ◽  
pp. 6950-6954 ◽  
Author(s):  
K. V. Bhagwat ◽  
P. Chaddah
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Critical State ◽  
Analytic Solution ◽  
Critical State Model ◽  
State Model ◽  
Elliptical Cylinder ◽  
Field Dependent

AC Susceptibility Study of the Inter- and Intragranular Properties in (Bi,Pb):2223 Superconductor

1997 ◽  
Vol 11 (29) ◽  
pp. 3461-3467 ◽  
Author(s):  
A. V. Pop ◽  
R. Deltour ◽  
A. Harabor ◽  
D. Ciurchea ◽  
Gh. Ilonca
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Critical State ◽  
Single Phase ◽  
Ac Susceptibility ◽  
Critical State Model ◽  
State Model ◽  
Susceptibility Study ◽  
Ac Field

The temperature and amplitude of AC field dependencies of both inter-and intragranular T p and T g temperatures of the imaginary peaks of χ′′ has been studied for a sintered single phase (Bi,Pb):2223 superconductor. The AC field dependencies for T p and T g and the relation between inter- and intragrain force densities were discussed by using Müller critical-state model. From the χ′′(T) curve, the values of intergrain magnetic critical current density J cJ was obtained via the application of Bean's critical state model. J cJ (T) dependence near T c agree with the assumption of SNS intergrain junctions.

The Fe Influence on the Vortex Response to the AC Field in Bulk (Bi, Pb):2223 Superconductor

1998 ◽  
Vol 12 (27) ◽  
pp. 1117-1124 ◽  
Author(s):  
A. V. Pop
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Critical State ◽  
Ac Susceptibility ◽  
Field Amplitude ◽  
Critical State Model ◽  
Pinning Force ◽  
Fast Decrease ◽  
Ac Field

The effect of Fe 3+ ions on the inter- and intragranular Tp and Tg temperatures of the imaginary peaks of the AC susceptibility has been studied for a (Bi, Pb):2223 superconductor. The linear dependencies of Tp and Tg as a function of AC field amplitude agree with Muller critical state model. The Fe 3+ ions induced a fast decrease of inter and intragranular pinning force densities. The intergrain critical current density J cj calculated from χ″(T) curve is lower in x=0.02 Fe doped sample than in x=0.00 sample. J cj (T) dependence near Tc agrees with the assumption of SNS intergrain junctions.

Sign in / Sign up

Export Citation Format

Share Document