Shift of superconducting transition temperatures in "magnetic superconductor" RuSr₂(Eu₁.₅Ce₀.₅)₁₀₋δ under influence of annealing in high pressure oxygen atmosphere

• Дата: 2016
• Автор: Beliayev, E.Yu.
• Формат: Стаття
• Мова: English
• Опубліковано: НТК «Інститут монокристалів» НАН України 2016
• Назва видання: Functional Materials
• Теми: Characterization and properties
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/120609
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Shift of superconducting transition temperatures in "magnetic superconductor" RuSr₂(Eu₁.₅Ce₀.₅)₁₀₋δ under influence of annealing in high pressure oxygen atmosphere / E.Yu. Beliayev// Functional Materials. — 2016. — Т. 23, № 2. — С. 165-169. — Бібліогр.: 9 назв. — англ.

Effect of annealing in high pressure oxygen atmosphere on superconducting transition temperatures for ceramic samples of magnetic superconductor RuSr₂(Eu₁.₅Ce₀.₅)₁₀₋δ was studied. It was shown that properties of the samples are consistent with behavior of the granular superconducting system. As a result of oxygen saturation the superconducting transition temperatures become higher. Particularly, shift of the superconducting transition temperature for intergranular medium is ΔTci = 9.2 K and for the matter within the granules ΔTcg = 6.8 K. This difference is due to the mechanism of oxygen diffusion along the grain boundaries. In the temperature range of 135 < T < 350 K the resistance behavior obeys the Mott's law of variable range hopping for three-dimensional case.