Open AccessSuperconducting YBCO ceramics after exposure to a plasma flow to a mixture of argon and oxygen
Author(s) -
С. Х. Гаджимагомедов,
Д. К. Палчаев,
M. Kh. Gadzhiev,
Zh. Kh. Murlieva,
М. Х. Рабаданов,
P. M. Saypulaev,
N. A. Demirov,
R. M. Emirov,
A.E. Rabadanova
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1923/1/012007
Subject(s) - materials science , ceramic , argon , superconductivity , crystallite , stoichiometry , plasma , analytical chemistry (journal) , oxygen , phase (matter) , electrical resistivity and conductivity , condensed matter physics , composite material , metallurgy , chemistry , chromatography , physics , organic chemistry , quantum mechanics , engineering , electrical engineering
The structure and properties of superconducting nanostructured ceramics YBa 2 Cu 3 O 7-y (YBCO) before and after exposure to a plasma flow consisting of a mixture of argon and oxygen (at ∼ 600 °C for ∼ 1 min) are investigated. Plasma surface treatment, in addition to compaction of grains, leads to a change in the oxygen stoichiometry index and average crystallite size, as well as to a decrease in the proportion of the superconducting phase in the ceramic. After plasma treatment of ceramics, the character of the temperature dependence of the electrical resistance ρ = f (T) changes from metallic to semiconductor, and the temperature T c, onset remains constant.