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Doping of Sm3Ba5Cu8O19 compound with praseodymium

Sandoghchi, M ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1007/s10909-019-02332-1
  3. Publisher: Springer , 2020
  4. Abstract:
  5. An investigation has been carried out on the effects of praseodymium doping in Sm3−xPrxBa5Cu8O19 for different values of x. Results indicate that the transition temperature reduces almost linearly with x. Based on the Abrikosov–Gor’kov pair-breaking theory, it has been concluded that the exchange interaction constant is large (Jex = 110 meV) in the Sm3Ba5Cu8O19 compound. In addition, it seems that the hybridization of Pr4f states with O2p–Cu3d states has an important role in the depression of transition temperature of Sm3−xPrxBa5Cu8O19 for the Pr content < 10%. However, for the higher values of Pr, the two observed plateaus at the transition temperatures of ~ 60 K and ~ 17 K, respectively, resemble the structural phase transitions due to oxygen reduction in the YBa2Cu3O7 compound and the antiferromagnetic phase formation in the PrBa2Cu3O7 compound. It seems that depending on the Pr content, the pair-breaking, structural effects and hole localization are responsible for the reduction in the transition temperature. © 2020, Springer Science+Business Media, LLC, part of Springer Nature
  6. Keywords:
  7. Cuprate ; Pair-breaking ; Superconductor ; Transition temperature ; Barium compounds ; Electrolytic reduction ; Praseodymium ; Samarium compounds ; Superconducting materials ; Superconducting transition temperature ; Temperature ; Yttrium barium copper oxides ; Antiferromagnetic phase ; Cuprates ; Hole localization ; Oxygen Reduction ; Pair breaking ; PrBa2Cu3O7 ; Structural effect ; Structural phase transition ; Copper compounds
  8. Source: Journal of Low Temperature Physics ; Volume 198, Issue 5-6 , 2020 , Pages 252-268
  9. URL: https://link.springer.com/article/10.1007/s10909-019-02332-1