Improvement of structural and superconducting properties of Bi-2212 textured rods by substituting sodium. Issue 7 (15th May 2016)

• Record Type: Journal Article
• Authors: Nane, O.; Özçelik, B.; Amaveda, H.; Sotelo, A.; Madre, M.A.
• Is Part Of: Ceramics international. Volume 42:Issue 7(2016)
• Page Start: 8473
• Page End: 8477
• Publication Date: 2016-05-15
• Subjects: C. Superconductivity -- Bi-2212 -- Sodium substitution -- Critical current density -- Laser floating zone technique; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2016.02.068
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: In this paper, the physical and superconducting properties of Bi2 Sr2 Ca1− x Na x Cu2 O8+ δ with x =0.0, 0.05, 0.075, 0.1, and 0.20 textured superconducting fiber rods prepared by a laser floating zone (LFZ) technique were studied. The effects of Na +1 substitution for Ca 2+ have been investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), transport measurements, dc-magnetization, magnetic hysteresis and magnetic critical current density. The powder XRD patterns of samples have indicated that Bi-2212 phase is the major one, independently of Na content. The best critical temperature, T C, has been found as 93.3 K from M–T data for the sample with 0.075 Na substitution. The maximum magnetic J C value has been calculated as 1.35×10 5 A/cm 2 at 10 K for the 0.10 Na sample. The maximum transport critical current density has directly been measured as 1.3×10 3 A/cm 2 at 77 K for the 0.05Na sample.