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Effects of Non-stoichiometry in Eu–Ba–Cu–O Systems

Effects of Non-stoichiometry in Eu–Ba–Cu–O Systems Structural, electrical, and thermal properties of a series of superconductors Eu $$_{1+x}$$ 1 + x Ba $$_{2-x}$$ 2 - x Cu $$_{3}$$ 3 O $$_{7-\delta }$$ 7 - δ where $$x=0$$ x = 0 , 0.03, 0.05, 0.1, and 0.2 were investigated. According to the X-ray powder diffraction at room temperature, all the samples are single phase. Eu $$_{1+x}$$ 1 + x Ba $$_{2-x}$$ 2 - x Cu $$_{3}$$ 3 O $$_{7-\delta }$$ 7 - δ takes on an orthorhombic–tetragonal (O–T) phase transition for $$x=0.2$$ x = 0.2 . Corresponding to the O–T phase transition, the superconducting critical temperature $$T_{\mathrm{c}}$$ T c decreases rapidly with Eu content. Thermogravimetric analysis was used to investigate the total oxygen content by determining the weight loss in oxygen atmosphere. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Low Temperature Physics Springer Journals

Effects of Non-stoichiometry in Eu–Ba–Cu–O Systems

Journal of Low Temperature Physics , Volume 181 (6) – Sep 21, 2015

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Publisher
Springer Journals
Copyright
Copyright © 2015 by Springer Science+Business Media New York
Subject
Physics; Condensed Matter Physics; Characterization and Evaluation of Materials; Magnetism, Magnetic Materials
ISSN
0022-2291
eISSN
1573-7357
DOI
10.1007/s10909-015-1336-4
Publisher site
See Article on Publisher Site

Abstract

Structural, electrical, and thermal properties of a series of superconductors Eu $$_{1+x}$$ 1 + x Ba $$_{2-x}$$ 2 - x Cu $$_{3}$$ 3 O $$_{7-\delta }$$ 7 - δ where $$x=0$$ x = 0 , 0.03, 0.05, 0.1, and 0.2 were investigated. According to the X-ray powder diffraction at room temperature, all the samples are single phase. Eu $$_{1+x}$$ 1 + x Ba $$_{2-x}$$ 2 - x Cu $$_{3}$$ 3 O $$_{7-\delta }$$ 7 - δ takes on an orthorhombic–tetragonal (O–T) phase transition for $$x=0.2$$ x = 0.2 . Corresponding to the O–T phase transition, the superconducting critical temperature $$T_{\mathrm{c}}$$ T c decreases rapidly with Eu content. Thermogravimetric analysis was used to investigate the total oxygen content by determining the weight loss in oxygen atmosphere.

Journal

Journal of Low Temperature PhysicsSpringer Journals

Published: Sep 21, 2015

There are no references for this article.