Iron sulfide effects on AC susceptibility and electrical properties of Bi1.6Pb0.4Sr2CaCu2O8 superconductor

Results in Physics

R. Abd-Shukor¹  M.J. Masnita² 

[1] Department of Applied Physics, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia;Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia;

关键词: Ac susceptibility;    Microstructure;    Current density;    Flux pinning;   

DOI  :  

来源: DOAJ

【 摘 要 】

Magnetism and superconductivity are mutually exclusive phenomena and their interactions are interesting to study. In this work we studied the effects of antiferromagnetic FeS additions on the superconducting properties of Bi1.6Pb0.4Sr2CaCu2O8 (Bi-2212). Samples with starting composition Bi1.6Pb0.4Sr2CaCu2O8(FeS)x for x = 0–5.0 wt% were prepared using the solid state reaction method. The powder X-ray diffraction (XRD) patterns showed that the Bi-2212 phase was dominant in samples with x ≤ 0.2 wt% (≥92% volume fraction). Field emission scanning electron micrographs showed plate-like structure which increased in flakiness with FeS addition. The non-added samples showed the highest zero resistance temperature, Tc-zero and onset temperature, Tc-onset at 72 K and 83 K, respectively. The peak temperature, Tp of the imaginary part of the AC susceptibility increased for x ≤ 0.2 wt% samples indicating an increase in the flux pinning force. The x = 5.0 wt% samples showed the Bi-2212 (63%) and Bi-2201 (37%) phase and semiconducting-like behavior without any superconducting transition. This work showed that nano-sized FeS can be used to increase the flakiness and flux pinning force of Bi1.6Pb0.4Sr2CaCu2O8 for x ≤ 0.2 wt%.

【 授权许可】

Unknown