Twin plane influence on critical transport current along the c-axis in YBaCuO

S. Sanfilippo; D. Bourgault; C. Villard; R. Tournier; P. Gautier Picard; E. Beaugnon; A. Sulpice; Th. Fournier; P. Germi

doi:10.1209/epl/i1997-00410-4

All issues

Volume 39 / No 6 (September 1997)

Europhys. Lett., 39 6 (1997) 657-662

Abstract

Issue		Europhys. Lett. Volume 39, Number 6, September 1997


Page(s)		657 - 662
Section		Condensed matter: electronic, structure, electrical, magnetic and optical properties
DOI		https://doi.org/10.1209/epl/i1997-00410-4
Published online		01 September 2002

Europhys. Lett., 39 (6), pp. 657-662 (1997)

Twin plane influence on critical transport current along the c-axis in YBaCuO

S. Sanfilippo¹, D. Bourgault¹, C. Villard¹, R. Tournier¹, P. Gautier Picard¹, E. Beaugnon¹, A. Sulpice², Th. Fournier² and P. Germi³

¹ 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

Received: 17 April 1997
Accepted: 27 July 1997

Abstract

The magnetic-field angular dependence of the c-axis transport critical current density $J_{\rm c} (\theta,B)$ in bulk-textured single-domain YBCO samples is studied with the field in the ab-plane. Above a matching field $B_{\mit\Phi}$ associated with the twin boundary network, $J_{\rm c} (\theta)$ shows a fourfold peak structure related to vortex pinning by alternatively the (110) and $(1\bar 10)$ 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 $B_{\mit\Phi}$ , the twin plane network gives rise to a lock-in of the vortices characterised by an angular and field-independent J_c.

PACS: 74.60.-w – Type-II superconductivity / 74.60.Ge – Flux pinning, flux creep, and flux-line lattice dynamics / 74.60.Jg – Critical currents

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