Author:
Kh Gadzhimagomedov S,Palchaev D K,Kh Gadzhiev M,Murlieva Zh Kh,Kh Rabadanov M,Saypulaev P M,Demirov N A,Emirov R M,Rabadanova A E
Abstract
Abstract
The structure and properties of superconducting nanostructured ceramics YBa 2Cu 3O7-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.
Subject
General Physics and Astronomy
Cited by
2 articles.
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