| Numéro |
J. Phys. Colloques
Volume 49, Numéro C8, Décembre 1988
Proceedings of the International Conference on Magnetism
|
|
|---|---|---|
| Page(s) | C8-2093 - C8-2098 | |
| DOI | https://doi.org/10.1051/jphyscol:19888944 | |
Proceedings of the International Conference on Magnetism
J. Phys. Colloques 49 (1988) C8-2093-C8-2098
DOI: 10.1051/jphyscol:19888944
1 IBM Thomas J. Watson Research Center, Yorktown Heights, NY 10598 U.S.A.
2 Dept. of Physics, Bar-Ilan University, Ramat-Gan, Israel
3 Physics Dept., Harvard University, Cambridge, Mass
J. Phys. Colloques 49 (1988) C8-2093-C8-2098
DOI: 10.1051/jphyscol:19888944
THE EFFECT OF FLUX PINNING AND FLUX CREEP ON MAGNETIC MEASUREMENTS OF SINGLE CRYSTAL Y1Ba2Cu3O7-x
T. W. Worthington1, Y. Yeshurun2, A. P. Malozemoff1, R. M. Yandrofski3, F. H. Holtzberg1 et T. R. Dinger11 IBM Thomas J. Watson Research Center, Yorktown Heights, NY 10598 U.S.A.
2 Dept. of Physics, Bar-Ilan University, Ramat-Gan, Israel
3 Physics Dept., Harvard University, Cambridge, Mass
Abstract
A series of noncontact magnetic measurements on high-quality single crystals of Y1Ba2Cu3O7-x indicate that the superconducting properties are those of a conventional anisotropic superconductor. However, the magnetic properties are profoundly affected by flux pinning. We develop a classical, thermally activated flux flow model which we use to extract HC1 from the decay of the remnant magnetization at low temperature and to explain the logarithmic frequency dependence and the curvature seen in the apparent HC2 near TC.