Pinning and dissipative effects in Bi-Pb-Sr-Ca-CuO superconductor
Abstract
Pinning and dissipative effects have been investigated in Bi-Pb-Sr-Ca-CuO sintered compounds by means of dc magnetization and magnetic relaxation measurements. Hysteresis cycles have been performed up to 5 T from 18 to 50 K, and the time decay of the zero field cooled magnetization M(zfc) has been recorded both as a function of field and temperature. The observed temperature dependence of the reduced pinning force and the crossover from a logarithmic to a nonlogarithmic time decay of M(zfc) are discussed in relation to the collective pinning and the related extensions to flux creep.
- Publication:
-
Journal of Superconductivity
- Pub Date:
- February 1992
- DOI:
- 10.1007/BF00617995
- Bibcode:
- 1992JSup....5...39F
- Keywords:
-
- Bismuth Oxides;
- Flux Pinning;
- High Temperature Superconductors;
- Magnetic Relaxation;
- Magnetization;
- Mixed Oxides;
- Calcium Oxides;
- Copper Oxides;
- Lead Oxides;
- Strontium Compounds;
- Solid-State Physics