Effect of Yttrium substitution on superconductivity in Bi-2212 textured rods prepared by a LFZ technique. Issue 2 (1st February 2016)

• Record Type: Journal Article
• Authors: Özçelik, B.; Nane, O.; Sotelo, A.; Madre, M.A.
• Is Part Of: Ceramics international. Volume 42:Issue 2:Part B(2016)
• Page Start: 3418
• Page End: 3423
• Publication Date: 2016-02-01
• Subjects: C. Magnetic properties -- Bi-2212 -- Yttrium substitution -- Critical current density JC -- Laser floating zone technique; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2015.10.137
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: In this study, the physical and superconducting properties of the Bi2 Sr2 Ca1− x Y x Cu2 O8+ δ with x =0.0, 0.05, 0.075 0.1, and 0.20 textured superconducting rods prepared by a laser floating zone technique were presented. The effects of Y 3+ substitution for Ca 2+ have been investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), dc-magnetization, magnetic hysteresis and critical current density calculation by using the Bean׳s critical state model. The powder XRD patterns of the samples have shown the Bi-2212 phase is the major one. Along with the powder samples, the textured rod surfaces also were investigated by XRD. The grains found to be well-oriented along the longitudinal rod axis which is a typical result for superconductors prepared by laser floating zone (LFZ) method, has been observed. The best critical temperature, T C, has been found as 92.9 K for the sample with 0.15Y substitution, under DC magnetic field of 50 Oe in ZFC mode. It has also been observed that the critical current density decreases with increasing Y-substitution. Using those values, the maximum J C value has been determined as 2.37×10 5 A/cm 2 for the undoped sample.