Preparation of granular Bi-2212 nanowires by electrospinning. (1st February 2017)

• Record Type: Journal Article
• Authors: Zeng, Xian Lin; Koblischka, Michael R; Karwoth, Thomas; Hauet, Thomas; Hartmann, Uwe
• Is Part Of: Superconductor science & technology. Volume 30:Number 3(2017:Mar.)
• Publication Date: 2017-02-01
• Subjects: Bi-2212 -- high-Tc -- superconductor -- nanowire -- electrospinning -- doping; 74.72.-h -- 74.25.Ha -- 74.25.F- -- 81.07.Gf; Superconductivity -- Periodicals; Superconductors -- Periodicals; 537.623
• DOI: 10.1088/1361-6668/aa544a
• Languages: English
• ISSNs: 0953-2048

Abstract

Abstract: Bi2 Sr2 CaCu2 O8 (Bi-2212) superconducting nanowires are synthesized by the electrospinning method. Two different precursors were employed to grow the nanowires, a Pb-doped one and a Cu, Ca-enriched one. The granular polycrystalline character was confirmed by scanning electron microscopy and x-ray diffraction measurement. The magnetic and electric properties of the samples were investigated via SQUID magnetometry and four-probe resistance measurements. The superconducting transition temperatures of the two systems were found to be similar (Pb-doped 84 K, Cu, Ca-enriched 76 K), but the transition width and the onset of irreversibility were clearly different. The magnetization loops and the resistance data demonstrate that the Cu, Ca-enriched precursor yields samples with better superconducting properties.