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Magnetically Modulated Microwave Absorption Behavior in the Bi–Pb–Sr–Ca–Cu–O/CdS Composite

  • G. Alvarez
  • E. Díaz-Valdés
  • J. Aguilar-Hernández
  • F. de Moure-Flores
  • R. Zamorano
  • G. S. Contreras-Puente
Original Paper

Abstract

The effect of depositing CdS nanoparticles on the surface of a high-temperature superconductor Bi–Pb–Sr–Ca–Cu–O is investigated by means of magnetically modulated microwave absorption spectroscopy (MAMMAS), for the 77–300 K temperature range. The experimental results indicate that the onset of superconducting transition in Bi–Pb–Sr–Ca–Cu–O/CdS composite is shifted to high temperature, with regard to the single superconductor sample; and it is associated to the presence of new superconducting phase in the interface between the superconductor micrograins and the CdS nanoparticles. Additionally, the low-field microwave absorption (LFMA) at liquid nitrogen temperature is used to confirm the superconductor state of these materials.

Keywords

Magnetically modulated microwave absorption High-temperature superconductor CdS nanoparticles Spray pyrolysis deposition Composite material 

Notes

Acknowledgments

G. Alvarez acknowledges research support in the laboratory of magnetic mensurations and biophysics of ESFM-IPN-Mexico. We also acknowledge the partial financial support of CONACYT-SENER with grant CEMIE-SOL project 37.

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • G. Alvarez
    • 1
  • E. Díaz-Valdés
    • 1
  • J. Aguilar-Hernández
    • 1
  • F. de Moure-Flores
    • 2
  • R. Zamorano
    • 1
  • G. S. Contreras-Puente
    • 1
  1. 1.Escuela Superior de Física y Matemáticas del Instituto Politécnico NacionalMéxicoMéxico
  2. 2.Facultad de Química-MaterialesUniversidad Autónoma de QuerétaroQuerétaroMéxico

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