Logarithmic-to-Nonlogarithmic Flux-Creep Transition and Magnetic-Flux Hardening in Bi-Sr-Ca-Cu-O Superconducting Ceramics
A sharp temperature- and field-dependent transition from a logarithmic to a nonlogarithmic flux-creep behavior has been found in Bi-Sr-Ca-Cu-O superconductors. The transition is not followed by any noticeable change in the magnetization. However, vibrating-reed measurements show that it coincides with a strong hardening of the magnetic structure. The transition occurs at fields and temperatures well below the reversibility line. The possible relation to the recently proposed flux lattice melting is discussed.
MSU Digital Commons Citation
Safar, Hugo F.; Durán, C.A.; Guimpel, Julio; Civale, L.; Luzuriaga, Javier; Rodriguez, Eduardo E.; De La Cruz, Francisco; Fainstein, Carlos; Schneemeyer, Lynn; and Waszczak, Joseph V., "Logarithmic-to-Nonlogarithmic Flux-Creep Transition and Magnetic-Flux Hardening in Bi-Sr-Ca-Cu-O Superconducting Ceramics" (1989). Department of Chemistry and Biochemistry Faculty Scholarship and Creative Works. 53.