Title :
Bulk, surface and shape contributions to critical current density in as-grown BSCCO-2212 single crystals. Part B-non-equilibrium behavior
Author :
Doyle, T.B. ; Labusch, R.
Author_Institution :
Sch. of Pure & Appl. Phys., Univ. of the Natal, Durban, South Africa
fDate :
6/1/2003 12:00:00 AM
Abstract :
In this work the treatment outlined in Part A (see ibid., p.3113-16) on the equilibrium behavior is extended to the nonequilibrium behavior in the as-grown BSCCO-2212 (c-axis) system. Calculated m(h) curves are fitted to normalized experimental M-Ho isotherms for single crystal specimens with platelet, disc and ´prism´ geometry. Self-consistent results are obtained for the quasistatic bulk critical current, Jc(B,T), which is in limited agreement with theoretical prediction, and also for the surface-barrier and anisotropy contributions to the magnetization behavior in these specimen geometries.
Keywords :
bismuth compounds; calcium compounds; critical current density (superconductivity); flux pinning; high-temperature superconductors; magnetisation; strontium compounds; BSCCO-2212 crystals; Bi2Sr2CaCu2O; M-Ho isotherms; anisotropy contribution; critical current density; magnetization; nonequilibrium behavior; surface-barrier contribution; vortex pinning; Africa; Anisotropic magnetoresistance; Critical current; Critical current density; Crystallization; Crystals; Geometry; Magnetization; Shape; Surface treatment;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2003.812118