In-plane Aligned YBCO Thin Film Tape Fabricated by Pulsed Laser Deposition

Hasegawa, Katsuya; Yoshida, Noriyuki; Fujino, K.; Mukai, H.; Hayashi, Kazuhiko; Sato, K.; Honjo, S.; Sato, Y.; Ohkuma, Takeshi; Ishii, Hideo; Iwata, Y.; Hara, T.

doi:10.1007/978-4-431-68473-2_23

Cited by 30 publications

(12 citation statements)

References 4 publications

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“…PLD technique has been regarded as one of the most promising methods because of precise control of films reproducibility, uniformity and simplicity, so it has been widely used in preparing thin films. Since the growth condition of YBCO thin films was sensitive to the deposition temperature, effect of deposition temperature and thickness on the growth of epitaxial YBCO films with c-axis orientation has been extensively studied by various methods [3][4][5]. From the results of previous studies [6][7][8], the optimal temperature range of YBCO film growth was concerned and the thickness of YBCO films largely affected the critical current density.…”

Section: Introductionmentioning

confidence: 99%

Influence of CeO2-Cap Layer on the Texture and Critical Current Density of YBCO Film

Liu

Wang

et al. 2011

J Supercond Nov Magn

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YBa 2 Cu 3 O 7 (YBCO) thin films have been fabricated on different textured CeO 2 -cap layers by pulsed laser deposition (PLD). The texture and critical current density J c of YBCO thin films have been systematically investigated. Both in-plane and out-of-plane textures of YBCO films and CeO 2 -cap films were characterized by X-ray diffraction (XRD). And the critical currents of YBCO films were measured by the conventional four-probe method. It was found that the texture and J c of YBCO films were largely dependent on the texture of CeO 2 -cap layers under the optimized deposition conditions. With increasing the degree of in-plane and out-of-plane texture of CeO 2 -cap layers, J c of YBCO films decreased from 4.23 × 10 6 A/cm 2 to 0.47 × 10 6 A/cm 2 . The FWHM values of the omega scan rocking curves of YBCO films decreased from 3.71 to 1.84°a nd the phi scan rocking curves from 6.68 to 4.91°with improvement of CeO 2 -cap layer texture. Our results indicated that the fabrication of high texture quality of CeO 2 -cap layer was necessary for the epitaxial growth of high-J c YBCO films. The high-quality YBCO films which are comparable with those grown on single crystal substrates could be achieved on high textured CeO 2 -cap layers buffered metal substrates.

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Section: Introductionmentioning

confidence: 99%

Influence of CeO2-Cap Layer on the Texture and Critical Current Density of YBCO Film

Liu

Wang

et al. 2011

J Supercond Nov Magn

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“…Thus, reducing the dissipation across GBs at their operating current could lead to important improvements. Additional techniques for biaxial texture, including inclined substrate deposition (ISD), are also being studied (see Hasegawa, et al, 1997 andBauer, et al, 1999).…”

Section: Grain Boundaries In Hts and Strategies To Deal With Themmentioning

confidence: 99%

The phenomenology of high-temperature superconductive materials

Gray

2002

AIP Conference Proceedings

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Abstract. High-temperature superconductors offer considerable promise for high current applications. Some of the relevant issues, such as materials, grain boundaries and dissipation, will be introduced and both the fundamental and practical aspects will be addressed. For example, the first generation powder-in-tube wires based on the bismuth cuprate have restricted high field performance at liquid nitrogen temperature due to the weak inter-bilayer coupling of magnetic vortices. The second generation coated conductor uses YBa 2 Cu 3 O 7 to overcome this, but it requires a high degree of biaxial texturing in order to provide notable performance in high fields in liquid nitrogen.

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“…High biaxial texture of the YBCO layer is a key requirement for achieving J c values in excess of 1 MA/cm 2 [9]. This biaxial texture can be obtained by depositing buffer layers on randomly oriented polycrystalline substrates using ion-beam-assisted-deposition (IBAD) [1,10] or inclined-substrate-deposition (ISD) [11] processes. These buffer layers serve as templates for subsequent growth of textured YBCO film.…”

Section: Introductionmentioning

confidence: 99%

Transverse compressive stress, fatigue, and magnetic substrate effects on the critical current density of Y-Ba-Cu-O coated RABiTS tapes

Cheggour¹,

Ekin²,

Clickner³

et al. 2002

AIP Conference Proceedings

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The electromechanical properties of (0.3 |im thick) yttrium-barium-copper-oxide (YBCO) coatings on buffered pure-nickel rolling-assisted-biaxially-textured substrates (RABiTS) were measured at 76 K and self magnetic field. YBCO coatings on buffered substrates both 50 |nm and 125 [im thick were tested. Significant degradation of transport critical-current density (J c ) can occur from transverse compressive stress unless the inplane yielding of the substrate is prevented by providing frictional support to the sample or by using substrate materials of high yield-strength. Scanning electron microscopy was used to investigate the microstructure of the samples after electromechanical testing. Isolated defective regions were found with a mixed pattern of cracks, both longitudinal and transverse to the direction of electrical-current flow. The more the degradation of J c from electromechanical testing, the greater the density of the observed cracked regions. Also, it was found that the use of magnetic substrates in the fabrication of the YBCO coatedconductor tapes produces a significant reduction in J c when the tapes are arranged in a stack of two or more layers. This effect is reversible upon unstacking the tapes.

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In-plane Aligned YBCO Thin Film Tape Fabricated by Pulsed Laser Deposition

Cited by 30 publications

References 4 publications

Influence of CeO2-Cap Layer on the Texture and Critical Current Density of YBCO Film

Influence of CeO2-Cap Layer on the Texture and Critical Current Density of YBCO Film

The phenomenology of high-temperature superconductive materials

Transverse compressive stress, fatigue, and magnetic substrate effects on the critical current density of Y-Ba-Cu-O coated RABiTS tapes

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