Dresden 2014 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 30: Superconductivity - Poster Session
TT 30.6: Poster
Montag, 31. März 2014, 15:00–19:00, P2
Ba2YNbO6 and Ba2YTaO6 doped YBa2Cu3O7−δ films — •Lars Opherden1, Jens Hänisch1, Max Sieger1, Marco Bianchetti2, Judith MacManus-Driscoll2, Ludwig Schultz1, and Ruben Hühne1 — 1Institute for Metallic Materials, IFW Dresden, Dresden, Germany — 2Department of Material Science and Metallurgy, University of Cambridge, Cambridge , UK
High-temperature superconductors might be applied in advanced electromagnets for the purpose of high field experiments. To realize such new types of superconducting magnets, the critical current density of high-temperature superconductors like YBa2Cu3O7−δ (YBCO) needs to be improved. To achieve this goal, flux lines have to be immobilized in particular at the application temperature.
Therefore, we introduce nanoscaled pinning centers applying YBCO targets mixed with different amounts of the secondary phases. The incorporation of Ba2YNbO6 and Ba2YTaO6 nanoparticles in the YBCO matrix leads to the formation of very fine self-assembled nanorods with significantly improved critical current densities Jc(B,θ)[1,2].
To study this behavior in more detail, thin undoped and doped films were prepared on single crystalline substrates by pulsed laser deposition. X-ray diffraction and texture measurements were carried out to determine the crystal structure, whereas inductive and transport current measurements were performed to evaluate the superconducting properties Tc and Jc(B) in different temperature regions.
G. rcolano et al., Supercond. Sci. Technol. 24 (2011) 095012
S. A. Harrington et al., Supercond. Sci. Technol. 22 (2009) 022001