| Numéro |
J. Phys. Colloques
Volume 49, Numéro C8, Décembre 1988
Proceedings of the International Conference on Magnetism
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|
|---|---|---|
| Page(s) | C8-2107 - C8-2108 | |
| DOI | https://doi.org/10.1051/jphyscol:19888947 | |
Proceedings of the International Conference on Magnetism
J. Phys. Colloques 49 (1988) C8-2107-C8-2108
DOI: 10.1051/jphyscol:19888947
1 INFN, Lab. Naz. Frascati, 00044 Frascati, Italy
2 Dip. di Fisica, Universita di Roma II, Via O. Raimondo, 00173 Rome, Italy
3 Selenia Spa, Via Tiburtina, Rome, Italy
4 Dip. di Fisica, Universitã di Salerno, 84100 Salerno, Italy
5 Physique des Solides, Bât. 510, 91705 Orsay, France
6 Institut d'Electronique Fondamentale, Bât. 220, 91405 Orsay, France
J. Phys. Colloques 49 (1988) C8-2107-C8-2108
DOI: 10.1051/jphyscol:19888947
ON THE FIELD COOLED SUSCEPTIBILITY OF SUPERCONDUCTING YBaCuO SAMPLES
F. Celani1, R. Messi2, N. Sparvieri3, S. Pace4, A. Saggese1, C. Giovannella2, L. Fruchter5 et C. Chappert61 INFN, Lab. Naz. Frascati, 00044 Frascati, Italy
2 Dip. di Fisica, Universita di Roma II, Via O. Raimondo, 00173 Rome, Italy
3 Selenia Spa, Via Tiburtina, Rome, Italy
4 Dip. di Fisica, Universitã di Salerno, 84100 Salerno, Italy
5 Physique des Solides, Bât. 510, 91705 Orsay, France
6 Institut d'Electronique Fondamentale, Bât. 220, 91405 Orsay, France
Abstract
Using a SQUID magnetometer, we have studied the magnetization of different samples of high Tc sintered superconductors in field cooled (FC) conditions. Depending on the sample, very different trends in the variation of the saturation value of the FC magnetization with the field have been observed ; in particular for good samples it increases progressively with decreasing H. We ascribe the difference in behaviour to different strengths of coupling between grains, depending on the preparation conditions. Data obtained by complementary techniques support this explanation.