The Influence of Ce-Doping on Structural and Superconducting Properties in Low-Density Bi_1.6Pb_0.4Sr₂Ca_2-_xCe_xCu₃O_y Superconductor

Abstract

The influences of cerium doped on low density Bi-2223 superconductor have been studied and this study examines the significant changes in the structural and superconducting properties. The nominal compositions of low density Bi1.6Pb0.4Sr2Ca2-xCexCu3Oy (where x =0.000, 0.025, 0.05, 0.1 and 0.2) ceramic superconductor were prepared by solid state method. The effects of different Ce doping levels on the superconductor structure and superconducting properties has been investigated by field emission scanning electron microscopy (FESEM), X-ray diffraction analysis (XRD), electrical resistance and transport critical current density (JC) measurements. The results show that TC zero and JC of the samples reduced gradually with the increase in the Ce addition. It has been observed that, the JC of low density Bi-2223 for Ce-free was measured to be 12.120 A/cm2 and 0.448 A/cm2 in x=0.025 at 60 K under zero magnetic field. As for XRD analysis showed the doping of Ce reduced the volume fraction of the 2223 phase and increased the volume fraction of the 2212 phase. FESEM results showed the surface morphology not homogenous and weak links between superconducting grains of the samples due to increase of the Ce doping.

Sifat Elektrik dan Kerentanan Arus Ulang Alik Superkonduktor Bi(Pb)-Sr-Ca-Cu-O dengan Penambahan In2O3

“…Terdapat beberapa laporan terkini mengenai kesan terhadap sifat superkonduktor apabila didopkan dengan zarah bersaiz nanometer dan mikrometer dengan komposisi tertentu seperti Özçelik et al 2014;Robaiah et al 2016;Rodrigues et al 2013;Yavuz et al 2016). Kajian terhadap kesan penambahan indium (In) juga telah dijalankan.…”