| Full text | |
| Author(s): |
M. S. da Luz
[1]
;
C. A. M. dos Santos
[2]
;
M. J. R. Sandim
[3]
;
A. J. S. Machado
[4]
;
R. F. Jardim
[5]
Total Authors: 5
|
| Affiliation: | [1] Universidade de São Paulo. Escola de Engenharia de Lorena - Brasil
[2] Universidade de São Paulo. Escola de Engenharia de Lorena - Brasil
[3] Universidade de São Paulo. Escola de Engenharia de Lorena - Brasil
[4] Universidade de São Paulo. Escola de Engenharia de Lorena - Brasil
[5] Universidade de São Paulo. Instituto de Física - Brasil
Total Affiliations: 5
|
| Document type: | Journal article |
| Source: | Brazilian Journal of Physics; v. 37, p. 1155-1159, 2007-09-00. |
| Abstract | |
We report on the application of the Resistively Shunted Junction (RSJ) model to granular high T C superconductors. Some derived predictions of the RSJ model are applied to a set of superconducting granular samples which can be considered as a network of Josephson junctions. The investigated samples belong to both hole-doped Y1-xPr xBa2Cu3O7-delta (x = 0.0, 0.35, and 0.45) and the electron-doped Sm2-xCe xCuO4-delta (x = 0.18) systems which display the so-called double resistive superconducting transition. We have performed several transport measurements in these compounds including temperature and magnetic field dependence of the electrical resistance, R(T,H), and I-V characteristics. Several aspects of the I-V characteristics were quantitatively well described by the RSJ model. The combined results strongly suggest that dissipation in granular superconducting samples is a natural consequence of the normal current flowing in parallel with the supercurrent current. (AU) | |