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Infrared and electron spin resonance for the high temperature superconductor Y1Ba2Cu3O9−x

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Abstract

Samples of the high temperature superconductor Y-Ba-Cu-O were prepared to achieve the oxygen deficient perovskite structure Y1Ba2Cu3O9−x withx>2. The electrical resistance has been measured with the temperature in the range from 77 to 300 K, under the application of d.c. and a.c. with frequency 900 Hz. The d.c. produced a rather lower critical temperatureT c with zero resistance at 77.1 K, but the a.c. gave a sharp drop in the resistance but zero resistance was reached at liquid nitrogen temperature. To elucidate this behaviour, an X-ray diffraction pattern was obtained. An infrared analysis was carried out for the sample and the starting materials to provide more information about the bonds. To complete the picture, electron spin resonance study is discussed. It is important to point out that this is the first time infrared measurements for superconductors have been carried out in Egypt.

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Authors and Affiliations

  1. Physics Department, Faculty of Electronic Engineering, Menouf, Menofia University, Egypt

    M. A. T. Dawoud & A. A. El-Hamalawy

  2. Chemistry Department, Faculty of Electronic Engineering, Menouf, Menofia University, Egypt

    E. A. Ghali

Authors
  1. M. A. T. Dawoud
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  2. A. A. El-Hamalawy
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  3. E. A. Ghali
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Dawoud, M.A.T., El-Hamalawy, A.A. & Ghali, E.A. Infrared and electron spin resonance for the high temperature superconductor Y1Ba2Cu3O9−x . J Mater Sci 27, 4016–4020 (1992). https://doi.org/10.1007/BF01105098

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  • DOI: https://doi.org/10.1007/BF01105098

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