Journal of Siberian Federal University. Mathematics & Physics / Three-level Superconductivity in YBCO Doped with NiO Nanoparticles

Full text (.pdf)
Issue
Journal of Siberian Federal University. Mathematics & Physics. 2026 19 (3)
Authors
Semenov, Sergey V.; Petrov, Mikhail I.; Balaev, Timofey D.; Molokeev, Maksim S.; Nemtsev, Ivan V.; Kirillov, Viktor L.; Martyanov, Oleg N.; Gokhfeld, Denis M.
Contact information
Semenov, Sergey V. : Kirensky Institute of Physics Federal Research Center KSC SB RAS (Krasnoyarsk, Russian Federation); Siberian Federal University (Krasnoyarsk, Russian Federation); ; Petrov, Mikhail I. : Kirensky Institute of Physics Federal Research Center KSC SB RAS (Krasnoyarsk, Russian Federation); OCRID: 0000-0001-7105-4995; Balaev, Timofey D. : Kirensky Institute of Physics Federal Research Center KSC SB RAS (Krasnoyarsk, Russian Federation); Siberian Federal University (Krasnoyarsk, Russian Federation); ; Molokeev, Maksim S. : Kirensky Institute of Physics Federal Research Center KSC SB RAS (Krasnoyarsk, Russian Federation); Siberian Federal University (Krasnoyarsk, Russian Federation); OCRID: 0000-0002-8297-0945; Nemtsev, Ivan V. : Kirensky Institute of Physics Federal Research Center KSC SB RAS (Krasnoyarsk, Russian Federation); Siberian Federal University (Krasnoyarsk, Russian Federation); OCRID: 0000-0002-4222-3099; Kirillov, Viktor L. : Boreskov Institute of Catalysis SB RAS (Novosibirsk, Russian Federation); ; Martyanov, Oleg N. : Boreskov Institute of Catalysis SB RAS (Novosibirsk, Russian Federation); OCRID: 0000-0001-9999-8680; Gokhfeld, Denis M. : Kirensky Institute of Physics Federal Research Center KSC SB RAS (Krasnoyarsk, Russian Federation); OCRID: 0000-0001-9049-9973
Keywords
high-temperature superconductivity; YBCO; nickel oxide nanoparticles; three-level model; flux pinning; YBCO
Abstract

We report the existence of three superconducting subsystems in samples of high-temperature superconductor YBa2Cu3O7δ doped by NiO nanoparticles and then subjected to 18-hour annealing. These subsystems exhibit different superconducting transition temperatures and respond differently to magnetic fields. While two-level superconductivity formed by grain and intergranular boundary subsystems is known in polycrystalline superconductors, our material reveals an additional subsystem formed by surface layers of grains with reduced critical temperature and enhanced sensitivity to magnetic field

Pages
327–334
EDN
LTYPOK
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/158240