Study of Resistive Superconducting Transition of Bulk (Bi0.6Pb0.4)2Sr2Ca2Cu3Ox |
| W.M. Woch, M. Chrobak, R. Zalecki, A. Kołodziejczyk
AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Solid State Physics Dept., Al. Mickiewicza 30, 30-059 Kraków, Poland |
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| The temperature widths of the resistive transition as well as the thermal fluctuations of bulk (Bi0.6Pb0.4)2Sr2Ca2Cu3Ox superconductor with Tc, 50%=107.1 K were studied. The applied magnetic field widens the resistive transition according to the following formula: ΔT=CHm+ΔT0. The value of exponent m=0.44 suggests that there is strong pining of vortices, especially at lower temperatures. The critical exponents λ of the conductivity were calculated using the following equation: Δσ=Kε-λ, with the λ1=1.75 close to the zero critical temperature and λ2=3.77 at higher temperatures. These values were discussed within the available theoretical models. |
DOI: 10.12693/APhysPolA.126.328 PACS numbers: 74.25.F-, 74.25.Uv, 74.25.Wx, 74.72.-h, 64.60.F- |