Low ac field response of Bi-based superconductors with addition of Antimony oxide

11th European Conference on Applied Superconductivity

Metskhvarishvili, I.R.^1 ; Dgebuadze, G.N.^1 ; Bendeliani, B.G.^1 ; Lobzhanidze, T.E.^2 ; Metskhvarishvili, M.R.^3 ; Mumladze, G.N.^1

Department of Cryogenic Technique and Technologies, Ilia Vekua Sukhumi Institute of Physics and Technology, Mindeli str. 7, Tbilisi

0186, Georgia^1

Department of Chemistry, Faculty of Exact and Natural Sciences, Ivane Javakhishvili Tbilisi State University, Chavchavadze Ave. 3, Tbilisi

0179, Georgia^2

Department of Physics, Georgian Technical University, Kostava str. 77, Tbilisi

0175, Georgia^3

关键词: Ac susceptibility;    Bi-based super conductors;    Critical state models;    Nonlinear magnetic response;    Polycrystalline superconductors;    Solid state reaction method;    Superconducting properties;    Transport critical current density;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/507/1/012032/pdf
DOI  :  10.1088/1742-6596/507/1/012032

来源: IOP

【 摘 要 】

We report the effects of the addition of Sb2O3on the superconducting properties of Bi-2223 system. Samples with composition Bi1.7Pb0.3Ca2Sr2Cu3SbxOy(x=0,0-0.8 wt.%) are prepared by the solid-state reaction method. Ac susceptibility and high harmonic response of polycrystalline superconductors are measured in weak ac and dc magnetic fields. Critical state models are used to explain the nonlinear magnetic response and it is found that the low field odd harmonic response is qualitatively explained reasonably well within the Kim-Anderson regime. We observed that, the low level Antimony doping enhances the transport critical current densities Jc.