Volume 39, Number 6, September 1997
|Page(s)||657 - 662|
|Section||Condensed matter: electronic, structure, electrical, magnetic and optical properties|
|Published online||01 September 2002|
Twin plane influence on critical transport current along the c-axis in YBaCuO
Elaboration par Procédés Magnétiques-Matformag, Centre National de la Recherche
Scientifique, 25 Avenue des Martyrs, 38042 Grenoble cedex 9, France
2 Centre de Recherches sur les Très Basses Températures, Centre National de la Recherche Scientifique, 25 Avenue des Martyrs, 38042 Grenoble cedex 9, France
3 Laboratoire de Cristallographie, Centre National de la Recherche Scientifique, 25 Avenue des Martyrs, 38042 Grenoble cedex 9, France
Accepted: 27 July 1997
The magnetic-field angular dependence of the c-axis transport critical current density in bulk-textured single-domain YBCO samples is studied with the field in the ab-plane. Above a matching field associated with the twin boundary network, shows a fourfold peak structure related to vortex pinning by alternatively the (110) and twin planes directions. The peak value is independent of the field intensity up to 8 T, due to long-range pinning by twin planes. Below , the twin plane network gives rise to a lock-in of the vortices characterised by an angular and field-independent Jc.
PACS: 74.60.-w – Type-II superconductivity / 74.60.Ge – Flux pinning, flux creep, and flux-line lattice dynamics / 74.60.Jg – Critical currents
© EDP Sciences, 1997
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