Resistive transition of TlBaCaCuO in high magnetic fields
- 1 April 1989
- journal article
- Published by IOP Publishing in Superconductor Science and Technology
- Vol. 1 (6) , 349-351
- https://doi.org/10.1088/0953-2048/1/6/017
Abstract
The authors have measured the resistance of a polycrystalline sample of Tl-Ba-Ca-Cu-O as a function of temperature and magnetic field. Above Tc, they see no systematic change in resistance as a magnetic field is applied. The deviation from linearity (onset of paraconductivity) in the resistivity transition Tc has been analysed in terms of fluctuations. Application of a magnetic field has only a small effect on the paraconductivity. Below Tc, the resistivity transition has an activated behaviour with activation energies varying from 1 eV at 0 T to 40 meV at 19 T. This behaviour may be explained within the framework of Anderson's theory of thermally activated flux motion.Keywords
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