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The impedance of the melt-textured YBaCuO superconducting slab in high dc magnetic field

Victor Chabanenko 1Pylyp Aleksyeyev 1,2Adam Nabiałek 2Sergiy Vasiliev 1Vladimir Rusakov 3Stanislaw Piechota 2Henryk Szymczak 2

1. Donetsk Physico-Technical Institute Ukrainian Academy of Sciences, R.Luxemburg str. 72, Donetsk 83114, Ukraine
2. Polish Academy of Sciences, Institute of Physics, al. Lotników 32/46, Warszawa 02-668, Poland
3. Donetsk National University, Universitetskaya str. 24, Donetsk 83055, Ukraine


We have performed ac impedance measurements of the melt-textured YBaCuO superconducting slab in a wide range of external dc magnetic field (from zero to 12 T). We have observed a peak in the real part of the impedance. This peak is connected with a skin size effect. It appears when ac penetration skin-size depth is equal to the half of the slab thickens.

In our work we analyze changes of this peak caused by variations of dc magnetic field and temperature. The changes of the peak are connected with some peculiarities of the average conductivity of the superconductor. In high temperature superconductors there are three characteristic ranges of the conductivity: flux-flow, flux-creep and thermally assisted flux-flow (TAFF) range. We analyze the conductivity of the YBaCuO sample by using the impedance measurements.


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Presentation: Poster at E-MRS Fall Meeting 2006, Symposium K, by Pylyp Aleksyeyev
See On-line Journal of E-MRS Fall Meeting 2006

Submitted: 2006-05-16 09:39
Revised:   2009-06-07 00:44