Title :
Properties of high-Tc oxide fibers from laser heated pedestal growth
Author :
Sun, J.Z. ; Feigelson, R.S. ; Gazit, D. ; Fork, D. ; Geballe, T.H. ; Kapitulnik, A.
Author_Institution :
Stanford Univ., CA, USA
fDate :
3/1/1989 12:00:00 AM
Abstract :
Bi-containing oxide superconductors have been made into fine fibers using the laser-heated pedestal growth (LHPG) method. These fibers grow with the c-axis of the grain normal to the growth direction. Studies of critical currents obtained by pulsed-current transport measurement and by magnetic shielding studies are compared. The transport and magnetic properties are promising for 60-Hz power applications and devices where the current is maintained by an outside source and a small amount of dissipation can be tolerated. Low pinning barriers and consequently appreciable flux creep seem to be intrinsic characteristics of the high-Tc oxide superconductors. To utilize them in situations where persistent currents are required, it will be necessary to incorporate more pinning centers
Keywords :
bismuth compounds; calcium compounds; critical currents; flux creep; flux pinning; high-temperature superconductors; magnetic shielding; strontium compounds; 60 Hz; Bi1.7Sr2.0Ca1.0Cu2.3O x; critical currents; flux creep; high temperature superconductivity; high-Tc oxide fibers; laser heated pedestal growth; magnetic shielding; persistent currents; pinning barriers; pinning centers; power applications; pulsed-current transport measurement; Creep; Critical current; Current measurement; Fiber lasers; Magnetic properties; Magnetic shielding; Optical fiber devices; Persistent currents; Pulse measurements; Superconductivity;
Journal_Title :
Magnetics, IEEE Transactions on
