Structural, Electrical, and Magnetic Properties of the Co-Substituted Bi-2212 System Textured by Laser Floating Zone Technique

  • A. Özaslan
  • B. Özçelik
  • B. Özkurt
  • A. Sotelo
  • M. A. Madre
Original Paper


In this work, Bi2Sr2CaCu2−x Co x O y (x=0.0, 0.05, 0.10, and 0.25) textured superconductors were prepared by a LFZ melting technique. In all cases, the powder X-ray diffraction patterns of samples show that the Bi-2212 phase is the major one. All samples have good oriented structure, which is a typical picture for superconductors prepared by the LFZ method. Magnetization hysteresis loops, made for all samples at two different temperatures, showed that the loops become narrower with increasing temperature and doping levels. In addition, the effect of Co doping on the critical current density, J c, of Bi2Sr2CaCu2−x Co x O y has been estimated from hysteresis loop measurement by using Bean’s model. The increase of the Co amount in the Bi2Sr2CaCu2−x Co x O y structure significantly decreases the critical current density, showing worse connectivity of the grains. All the results indicate that Co substitution for Cu produces the deterioration on the superconducting properties, compared with the undoped samples.


Bi-based cuprates XRD SEM Critical current MH LFZ-technique 



This work is supported by Research Fund of Çukurova University, Adana, Turkey, under grant contracts no: FEF2012YL7. A. Sotelo and M.A. Madre wish to thank the Gobierno de Aragón (Research Group T12), for financial support. M.A. Madre also acknowledges the MINECO-FEDER (Project MAT2011-22719) for funding.


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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • A. Özaslan
    • 1
  • B. Özçelik
    • 1
  • B. Özkurt
    • 2
  • A. Sotelo
    • 3
  • M. A. Madre
    • 3
  1. 1.Department of Physics, Faculty of Sciences and LettersÇukurova UniversityAdanaTurkey
  2. 2.Department of Electronic and Computer Education, Faculty of Tarsus Technical EducationUniversity of MersinMersinTurkey
  3. 3.ICMACSIC-Universidad de ZaragozaZaragozaSpain

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