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

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

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 re...

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Bibliographic Details
Main Author: Beliayev, E.Yu.
Format: Article
Language:English
Published: НТК «Інститут монокристалів» НАН України 2016
Series:Functional Materials
Subjects:
Characterization and properties
Online Access:http://dspace.nbuv.gov.ua/handle/123456789/120609
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Summary: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.

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