A.c. susceptibility of melt-processed high Tc superconductors

✍ Scribed by S Takács; F Gömöry

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 407 KB
• Volume: 33
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/0011-2275(93)90091-2

✦ Synopsis

and SIovak Federal Republic The force equilibrium equation including pinning, flux flow, flux creep and reversible flux line motion is used in order to calculate some properties of high T c superconductors connected with nonlinear flux diffusion. Some comparisons are made with experiments performed on melt-grown YBCO and melt-textured BSCCO as well as with results of the linear response theory. Our study shows that: (a) non-logarithmic relaxation is caused by flux flow; (b) interpretation of maxima in the imaginary part of a.c. susceptibility data as de-pinning lines seems to be questionable; (c) flux flow reduces the effects caused by the reversible flux line motion.