La2Zr2O7 single buffer layer for YBCO RABiTS coated Conductors

Tristan Caroff (1, 2) , Stéphanie Morlens (2) , Adulfas Abrutis (3) , Michel Decroux (4) , Patrick Chaudouët (1) , Laureline Porcar (5, 2) , Z. Saltyte (6) , Carmen Jiménez (1) , Philippe Odier (2) , François Weiss (1)

1 LMGP - Laboratoire des matériaux et du génie physique
2 CRETA - Consortium de Recherches pour l'Emergence des Technologies Avancées
3 Department of General and Inorganic Chemistry [Vilnius]
4 Department of Condensed Matter Physics
5 NEEL - TPS - Thermodynamique et biophysique des petits systèmes
6 Dpt of General and Inorganic Chemistry

Chemical deposition methods like MOD and MOCVD are promising approaches for coated conductors (CCs) due to their reduced cost and easy scaling. High quality La2Zr2O7 (LZO) buffer layers were prepared by MOD on Ni-5%at.W (NiW) RABiTS and subsequent YBCO layers (450 to 800 nm thick) were deposited by pulsed injection MOCVD, leading to a simple low cost architecture NiWRABiTS/LZOMOD/YBCOMOCVD. In this novel combination of MOD and MOCVD approach, a single LZOMOD buffer layer is sufficient to ensure structural compatibility between YBCO and NiW, and protect the substrate from oxidation during YBCO MOCVD. YBCO films were epitaxially grown on LZO and exhibited critical current densities Jc close to 1 MA/cm2 at 77 K with a critical temperature Tc =91 K and DTc < 1 K.

Domaines: Matériaux

Tristan Caroff, Stéphanie Morlens, Adulfas Abrutis, Michel Decroux, Patrick Chaudouët, et al.. La2Zr2O7 single buffer layer for YBCO RABiTS coated Conductors. Superconductor Science and Technology, 2008, 21, pp.75007. ⟨10.1088/0953-2048/21/7/075007⟩. ⟨hal-00395257⟩