Isfahan University of Technology, The Physics Society of Iran Iranian Journal of Physics Research 1682-6957 4 2 2019 11 26 AC susceptibility of polycrystalline (Bi-Pb) 2223 superconductors AC susceptibility of polycrystalline (Bi-Pb) 2223 superconductors 201 208 591 FA H. Salamati P. Kameli Journal Article 2019 11 26   The temperature dependence of ac susceptibility of (Bi-Pb)2223 polycrystalline samples was measured as a function of frequency and ac field amplitude. Analysis of the temperature dependence of the AC susceptibility near the transition temperature (Tc) has been done employing Bean’s critical state model. The observed variation of intergranular critical current densities (Jc) with temperature indicates that the weak links are superconductor- normal metal-superconductor (SNS) type for this sample. The frequency effect on AC susceptibility was also measured. As the frequency increases, (TP < /sub> ) shifts to higher temperatures. This effect can be interpreted in terms of flux creep. The temperature T, and field, , dependence of activation energy obtained from the Arrhenius plot for the frequency ( f ) and ( TP < /sub>) , can be described as: U(Hac,T)=U0(1-T/TC)Hac-0.18   The temperature dependence of ac susceptibility of (Bi-Pb)2223 polycrystalline samples was measured as a function of frequency and ac field amplitude. Analysis of the temperature dependence of the AC susceptibility near the transition temperature (Tc) has been done employing Bean’s critical state model. The observed variation of intergranular critical current densities (Jc) with temperature indicates that the weak links are superconductor- normal metal-superconductor (SNS) type for this sample. The frequency effect on AC susceptibility was also measured. As the frequency increases, (TP < /sub> ) shifts to higher temperatures. This effect can be interpreted in terms of flux creep. The temperature T, and field, , dependence of activation energy obtained from the Arrhenius plot for the frequency ( f ) and ( TP < /sub>) , can be described as: U(Hac,T)=U0(1-T/TC)Hac-0.18 high-Tc superconductivity AC susceptibility activation energy https://ijpr.iut.ac.ir/article_591_ed9a89ace53fa18bd3b70f9fc71881e3.pdf