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Electrical and magnetic properties of Pr-doped Nd123

Maleki, P ; Sharif University of Technology | 2004

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  1. Type of Document: Article
  2. DOI: 10.1002/pssc.200304481
  3. Publisher: 2004
  4. Abstract:
  5. Single-phase polycrystalline NdBa2-xPrxCu 3O7+δ (0 ≤ x ≤ 0.5) have been prepared by the standard solid-state reaction. The results of X-ray diffraction measurements confirm the formation of 123 single phase. A superconductor-insulator transition at XcSIT = 0.3 has been observed for the samples. The magnetoresistance of the samples have been investigated within the thermally activated flux creep model. The pinning energy decreases with the magnetic field application and Pr-doping. A scaling relation as power law dependence of pinning energy to the magnetic field has been obtained. The derived pinning energy shows that the Pr-doping plays the role of weak link. The normal state resistivity analysis shows that with the increase of x, there is a cross-over from 2D to 3D variable range hopping mechanism. © 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
  6. Keywords:
  7. Creep ; Thermal effects ; Polycrystalline materials ; Phase transitions ; Mathematical models ; Magnetoresistance ; Magnetization ; Doping (additives)
  8. Source: Physica Status Solidi C: Conferences ; Volume 1, Issue 7 , 2004 , Pages 1871-1874 ; 16101634 (ISSN)
  9. URL: https://onlinelibrary.wiley.com/doi/abs/10.1002/pssc.200304481