Biaxially textured YBa sub(2Cu) sub(3)O sub(7-) sub(x) films deposited on polycrystalline flexible yttria-stabilized zirconia ceramic substrates

Biaxially textured YBa sub(2Cu) sub(3)O sub(7-) sub(x) (YBCO) films were grown on polycrystalline flexible yttria-stabilized zirconia (YSZ) ceramic substrates (Ceraflex) buffered with MgO and LaMnO sub(3 layers. These substrates were initially coated with silica glass to obtain a smooth surface and...

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Bibliographic Details
Published in:Physica. C, Superconductivity Superconductivity, 2008-07, Vol.468 (14), p.1070-1077
Main Authors: Varanasi, C V, Burke, J, Lu, R, Wu, J, Brunke, L, Chuck, L, Smith, HE, Maartense, I, Barnes, P N
Format: Article
Language:English
Subjects:
CERAMICS
COPPER OXIDE
CRYSTAL STRUCTURE
DEPOSITION
GLASSES
MAGNESIUM OXIDE
Secondary ion mass spectrometry
Silica glass
SUPERCONDUCTORS
YBCO superconductors
YIELD STRENGTH
Yttria stabilized zirconia
YTTRIUM OXIDE
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Summary:Biaxially textured YBa sub(2Cu) sub(3)O sub(7-) sub(x) (YBCO) films were grown on polycrystalline flexible yttria-stabilized zirconia (YSZ) ceramic substrates (Ceraflex) buffered with MgO and LaMnO sub(3 layers. These substrates were initially coated with silica glass to obtain a smooth surface and then biaxially textured MgO buffer layers were deposited by ion beam assisted deposition (IBAD-MgO). Lanthanum manganate (LMO) cap layers and YBCO layers were then deposited by the pulsed laser ablation method. Highly textured YBCO films with a full width half maximum (FWHM) of 6.75 degree in (1 1 0) phi scans and a FWHM [not, vert, similar] 5 degree in (2 0 0) omega scans were obtained. An initial deposition yielded samples with a T) sub(c) 88 K and a self-field magnetization J sub(c of 2 x 10) super(5) A/cm super(2 at 77 K. A secondary ion mass spectrometry (SIMS) depth profile of the samples indicated that with the present deposition condition, some La, Mn and Mg diffusion into the YBCO layers is possible and this may reduce the J) sub(c) in the self-field. The yield strength (YS) of uncoated Ceraflex substrates was compared with that of metallic substrates and it was found that Ceraflex substrates can have a YS at least 4-5 times higher than the YS of biaxially textured Ni-5 at.%W substrates and [not, vert, similar]1.5 times that of Hastelloy super(TM substrates.)
ISSN:0921-4534
DOI:10.1016/j.physc.2008.05.258