Superconducting and structural properties of YBCO/CeO2/NiCr14 tapes prepared by thermal co-evaporation

Baldini, A.; Bindi, M.; Botarelli, A.; Gauzzi, A.; Gianni, L.; Ginocchio, S.; Tuissi, A.; Villa, Elena; Zannella, S.

doi:10.1016/s0921-4534(02)01035-3

Cited by 4 publications

(2 citation statements)

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“…It is therefore necessary to insert a buffer layer between the Ni substrate and the YBCO film to act as a diffusion barrier. Among all the buffer layers, CeO 2 [4][5][6], Y 2 O 3 , SrTiO 3 , YSZ [7] and BaZrO 3 are much studied. CeO 2 is commonly used as a buffer layer, however, micro-cracks were developed by thermal stress and often observed in thick CeO 2 films.…”

Section: Introductionmentioning

confidence: 99%

Deposition of Yb2O3 buffer films using H2O vapor by MOCVD method

Jung

Jun

Park

et al. 2007

Physica C: Superconductivity and its Applications

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Section: Introductionmentioning

confidence: 99%

Deposition of Yb2O3 buffer films using H2O vapor by MOCVD method

Jung

Jun

Park

et al. 2007

Physica C: Superconductivity and its Applications

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“…The thermal co-evaporation system used for this work has been described in detail elsewhere [8,9]. In summary, it is equipped with five boat crucibles for the evaporation of five metals, including Y, Ba and Cu, and with one e-beam source for the deposition of refractory materials.…”

Section: Introductionmentioning

confidence: 99%

High critical current density in YBCO coated conductors prepared by thermal co-evaporation

Bindi

Botarelli²,

Gauzzi

et al. 2004

Supercond. Sci. Technol.

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We report on the in situ preparation of Y Ba2Cu3O7−δ films uniformly deposited over large areas,>20 × 20 cm2, at 690 °C by thermal co-evaporation onto Ni–5 at.% W biaxially textured tapes buffered with e-beam evaporated CeO2. Typically, the thickness of the YBCO and CeO2 layers was 0.9 and 0.1 µm, respectively. Deposition rates were 0.2 and 2.5 nm s−1, respectively. X-ray diffraction θ–2θ Bragg–Brentano and pole figure measurements, and Nomarsky optical and SEM microscopy analysis show good biaxial texture of both layers, sharp interfaces and the absence of cracks. Midpoint critical temperatures, Tc, fall reproducibly in the 87–88 K range with transition widths ΔTc = 1 K. Remarkably high transport critical current densities, Jc, in the 2.0–2.5 MA cm−2 range are achieved at 77 K in 1 cm long samples. The above deposition route appears to be promising for the development of long-length YBCO coated conductors thanks to the relatively low deposition temperature, the high degree of uniformity over large areas and the simple single buffer layer architecture.

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