Journal of Materials Science: Materials in Electronics

, Volume 22, Issue 9, pp 1501–1508 | Cite as

Investigation of mechanical and superconducting properties of iron diffusion-doped Bi-2223 superconductors

  • O. Ozturk
  • H. A. Cetinkara
  • E. Asikuzun
  • M. Akdogan
  • M. Yilmazlar
  • C. TerziogluEmail author


The mechanical and superconducting properties of the Fe diffusion-doped (Bi-Pb)-2223 superconductor have been investigated. First, iron was evaporated on Bi-2223 superconductor and then the Fe layered superconductor was annealed at 830 °C for 10, 30 and 60 h. Static Vickers hardness, dc electrical resistivity, X-ray diffraction and scanning electron microcopy have been carried out to assess the effects of Fe doping. These measurements indicates that Fe doping, in comparison with the undoped samples, increased the critical transition temperature, and improved formation of high T c phase, while decreasing the number and size of voids. Moreover, both microhardness and grain size were also enhanced by increasing the amount of diffusion. The values of microhardness were found to be load dependent. In addition, we have investigated the indentation size effect (ISE) behavior using some models such as the Kick’s law, modified proportional specimen resistance (MPRS) model and the Hays- Kendall (HK) approach. Among them, both HK and MPRS models are successful. In this study, the possible reasons of noticed improvement on mechanical and physical properties due to iron diffusion are discussed.


Vickers Microhardness Undoped Sample Indentation Load Indentation Size Effect Iron Doping 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



This work is supported partly by The Scientific and Technological Council of Turkey (Project No: 104T325) and partly by the Turkish State Planning Organization (DPT) (Project No: 2004K120200).


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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • O. Ozturk
    • 1
  • H. A. Cetinkara
    • 2
  • E. Asikuzun
    • 1
  • M. Akdogan
    • 3
  • M. Yilmazlar
    • 4
  • C. Terzioglu
    • 3
    Email author
  1. 1.Department of Physics, Faculty of Arts and ScienceKastamonu UniversityKastamonuTurkey
  2. 2.Department of Physics, Faculty of Arts and ScienceMustafa Kemal UniversityHatayTurkey
  3. 3.Department of Physics, Faculty of Arts and ScienceAbant Izzet Baysal UniversityBoluTurkey
  4. 4.Faculty of EducationSakarya UniversityHendek, SakaryaTurkey

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