Microstructure and superconducting properties of high-rate PLD-derived GdBa 2 Cu 3 O 7-δ coated conductors with BaSnO 3 and BaZrO 3 pinning centers.

Autor: Ovcharov AV; National Research Center 'Kurchatov Institute', Moscow, 123182, Russia., Degtyarenko PN; SuperOx, Moscow, 117246, Russia.; Joint Institute for High Temperature of Russian Academy of Sciences, Moscow, 125412, Russia., Chepikov VN; SuperOx, Moscow, 117246, Russia.; Lomonosov Moscow State University, Moscow, 119991, Russia., Vasiliev AL; National Research Center 'Kurchatov Institute', Moscow, 123182, Russia. a.vasiliev56@gmail.com.; Shubnikov Institute of Crystallography of Russian Academy of Sciences, Moscow, 117333, Russia. a.vasiliev56@gmail.com.; Moscow Institute of Physics and Technology (State University), Dolgoprudny, Moscow Region, 141701, Russia. a.vasiliev56@gmail.com., Gavrilkin SY; P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, 119991, Russia., Karateev IA; National Research Center 'Kurchatov Institute', Moscow, 123182, Russia., Tsvetkov AY; P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, 119991, Russia., Kaul AR; SuperOx, Moscow, 117246, Russia.; Lomonosov Moscow State University, Moscow, 119991, Russia.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2019 Oct 23; Vol. 9 (1), pp. 15235. Date of Electronic Publication: 2019 Oct 23.
DOI: 10.1038/s41598-019-51348-w
Abstrakt: The microstructure of GdBa 2 Cu 3 O 7-δ based on superconducting tapes with BaSnO 3 and BaZrO 3 artificial pinning centers formed by high-rate pulse laser deposition in SuperOx Japan was studied by scanning/transmission electron microscopy. The artificial pinning centers have adopted columnar morphology with average diameter of about 8 nm (BaSnO 3 -doped sample) and 6.5 nm (BaZrO 3 -doped sample) and density of 500 μm -2 for the both samples. The average length of the BaSnO 3 nanocolumns is about two times higher than the BaZrO 3 nanocolumns. The angular dependences of critical current in magnetic field up to 1 Tesla at 77 and 65 K have been obtained. The critical current and its anisotropy depend on artificial pinning centers presence and their type. The angular dependence of resistivity in the field up to 9 Tesla was also studied and discussed.
Databáze: MEDLINE
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