Berlin 2018 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 16: Superconductivity: Properties and Electronic Structure II
TT 16.7: Vortrag
Montag, 12. März 2018, 16:45–17:00, H 0110
Fabrication of electrospun BSCCO nanowire networks with reduced preparation temperature — Michael Koblischka1, •XianLin Zeng1, Fabian Laurent1, Thomas Karwoth1, Anjela Koblischka-Veneva1, Uwe Hartmann1, Crosby Chang2, Thomas Hauet2, Praveen Kumar3, and Oliver Eibl3 — 1Institute of Experimental Physics, Saarland University, Campus C 6 3, D-66123 Saarbrücken, Germany — 2Institut Jean Lamour, UMR CNRS-Université de Lorraine, 54506 Vandoevre-lès-Nancy, France — 3Institute of Applied Physics, University of Tübingen, 72076 Tübingen, Germany
Bi2Sr2CaCu2O8+δ (Bi-2212) nanowire networks [1] were fabricated by electrospinning. A thermal treatment is required to obtain the final crystal structure, however, if the preparation temperature is too high, the nanowire structure may completely collapse. Therefore, Li acetate was added in various amounts to the starting composition. This enabled us to produce the desired Bi-2212 phase already at 750 ∘C instead of 840 ∘C. X-ray and TEM analysis proved that the resulting nanowires were single-phase Bi-2212. After electrospinning, the resulting samples form fabric-like networks, and the nanowire structure survived. The nanowires exhibit a polycrystalline structure with grain sizes of 20-50 nm, an average wire diameter of 100 nm and a length of up to several micrometers. The nanowire network samples were characterized by magnetic and electric measurements in fields up to 7 T.
This work is part of DFG-project Ko2323/8.
M.R.Koblischka et al., AIP Adv. 6, 035115 (2016).