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TI-Based Superconducting Films Prepared by Spray Pyrolysis and Vacuum Evaporation

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Abstract

TI-based films were prepared by the 2-step procedure. First, Ba-Ca-Cu-O precursors were deposited either from an aerosol or by thermal evaporation on MgO substrates. Thallination of precursors was then performed at 850 °C in flowing oxygen with annealing time up to 30 min. Films were characterized by Tc and X-ray measurements, and their depth profiles (RBS), surface morphology (SEM) and oxygen Raman modes were also investigated. The aerosol deposited films gave Tc = 94−103.5 K. Films grown by thermal evaporation revealed unusual Tc and structural changes during their 20-months storage in laboratory surroundings. Their Tc has increased from 94 to 106 K.

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Author notes

  1. M. Jergel

    Present address: Depto. de Física, CINVESTAV, Apdo, Postal 14-740, México

Authors and Affiliations

  1. Institute of Electrical Engineering, 84239, Bratislava, Slovakia

    M. Jergel, Š. Chromik, V. Štrbík & Š. Beňačka

  2. Depto. de Física, CINVESTAV, Apdo, Postal 14-740, México

    C. Falcony & A. Conde-Gallardo

  3. Institute of Inorganic Chemistry, 84236, Bratislava, Slovakia

    F. Hanic

  4. Instituto de Física, UNAM, Apdo, Postal 20-364, México

    E. Andrade & J. C. Cheang-Wong

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  1. M. Jergel
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  2. Š. Chromik
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  3. V. Štrbík
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  4. F. Hanic
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  5. Š. Beňačka
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  6. C. Falcony
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  7. A. Conde-Gallardo
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  8. E. Andrade
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  9. J. C. Cheang-Wong
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Jergel, M., Chromik, Š., Štrbík, V. et al. TI-Based Superconducting Films Prepared by Spray Pyrolysis and Vacuum Evaporation. Journal of Superconductivity 11, 63–64 (1998). https://doi.org/10.1023/A:1022629828694

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  • DOI: https://doi.org/10.1023/A:1022629828694

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