[Back]

R. Daminov, M. Reissner, M. Imayev, W. Steiner, M.V. Makarova, P.E. Kazin:
"Improvement of pinning in Bi2212-based materials by hot plastic deformation";
Journal of Physics: Conference Series, 43 (2006), 458 - 461.

Improvement of pinning in Bi2212-based materials by hot plastic deformation


R R Daminov1,2, M Reissner1, M F Imayev2, W Steiner1, M V Makarova3 and P E Kazin3
1 Institute of Solid State Physics, Vienna University of Technology, A-1040 Wien, Austria
2 Institute for Metals Superplasticity Problems, Russian Academy of Sciences, Ufa, 450001, Russia
3 Chemistry Department, Moscow State University, Moscow, 119992, Russia
E-mail: reissner@ifp.tuwien.ac.at

Abstract. Hot plastic deformation of bulk Bi2212 strongly improves pinning by introducing strong pinning centres accompanied by the formation of a high degree of texture. This is proved by an increase in critical current density and mean effective activation energy obtained from relaxation measurements, as well as from a large shift of the irreversibility line. The analysis shows that a simple interpretation of the U(J)-relation in terms of collective creep theory is not possible. Admixture of MgO particles gives similar, but less good results.

http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC06588129

http://dx.doi.org/10.1088/1742-6596/43/1/114