La2Zr2O7 single buffer layer for YBCO RABiTS coated conductors
T. Caroff,S. Morlens,Adulfas Abrutis,Michel Decroux,Patrick Chaudouët,L. Porcar,Z. Saltyte,Carmen Jiménez,P. Odier,François Weiss +9 more
TL;DR: In this article, a combination of MOD and MOCVD approaches, a single LZOMOD buffer layer is sufficient to ensure structural compatibility between YBCO and NiW.
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Abstract: 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 (450–800 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 approaches, 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 cm−2 at 77 K with a critical temperature Tc = 91 K and ΔTc<1 K.
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Citations
Barrier efficiency of sponge-like La2Zr2O7 buffer layers for YBCO-coated conductors
Leopoldo Molina,Haiyan Tan,Ellen Biermans,Kees Joost Batenburg,Jo Verbeeck,Sara Bals,Gustaaf Van Tendeloo +6 more
TL;DR: In this paper, a sponge-like structure composed of nanometer-sized voids is revealed by high-angle annular scanning transmission electron microscopy (STEM), electron energy-loss spectroscopy (EELS) and quantitative electron tomography.
Development of all chemical solution derived Ce0.9La0.1O2 − y/Gd2Zr2O7 buffer layer stack for coated conductors: influence of the post-annealing process on surface crystallinity
Yue Zhao,Xiao-Fen Li,Alexey Khoryushin,D. He,Niels Hessel Andersen,Jørn Hansen,Jean-Claude Grivel +6 more
TL;DR: In this paper, a biaxially textured Gd2Zr2O7 and Ce0.9La0.1O2? y?(CLO, cap)/Gd 2Zr 2O7 (GZO, barrier) buffer layer stack by the metal?organic deposition route is reported.
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Deposition of La2Zr2O7 film by chemical solution deposition
Zeming Yu,Philippe Odier,S. Morlens,Patrick Chaudouët,Maria Bacia,Lian Zhou,Pingxiang Zhang,Lihua Jin,C. S. Li,Philippe David,Olivier Fruchart,Yafeng Lu +11 more
TL;DR: In this article, the volume fraction of the cube texture in LZO films on Ni-5at%w RABITS was found to be a function of the speed of the gas flown above sample.
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Optimisation of single La2Zr2O7 buffer layers for YBCO coated conductors prepared by chemical solution deposition
S. Engel,Ruben Hühne,K. Knoth,Anuj Chopra,N.H. Kumar,V.S. Sarma,P.N. Santhosh,Ludwig Schultz,B. Holzapfel +8 more
TL;DR: In this paper, the local texture of the deposited layers has been studied throughout the thickness using ion-beam sputtering and electron back-scattering diffraction (EBSD) techniques, leading to a highly textured surface for annealing temperatures of 1050°C.
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A study of the parameters influencing the microstructure of thick La2Zr2O7 films
TL;DR: In this article, a tentative explanation for parameters influencing the origin and development of the nanovoids is presented, based on TEM observations, and the overall quality of the LZO layers greatly improved by the introduction of seed layers.
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