Berlin 2018 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 16: Superconductivity: Properties and Electronic Structure II
TT 16.8: Vortrag
Montag, 12. März 2018, 17:00–17:15, H 0110
Electrospun BSCCO donut-shaped superconducting rings — •XianLin Zeng, Fabian Laurent, Michael Koblischka, and Uwe Hartmann — Institute of Experimental Physics, Saarland University, Campus C 6 3, D-66123 Saarbrücken, Germany
By means of electrospinning, Bi2Sr2CaCu2O8+δ (Bi-2212) nanowire networks were fabricated. Using the as-spun polymer nanowires, we were able to create donut-shaped superconducting rings via mechanical treatment. These samples were heat-treated at 840 ∘C to form the superconducting phase and to remove the polymer. On the donut-shaped nanowire samples, we performed magnetization measurements in a PPMS magnetometer in fields up to 7 T to investigate their behavior concerning trapping of magnetic fields and persistent currents flowing in the remanent state after application of magnetic fields. Using a Hall probe, we measured the local field, Bi, inside the rings at various temperatures and fields. Our results show that these donut-shaped rings can act as magnetic shields at low temperatures.
This work is part of DFG-project Ko2323/8.