Effect of oxide additives on the properties of high temperature superconductor, YBa2Cu3O7
TLDR
The effect of oxide additives on sintering and superconducting properties of YBa2Cu3O7 was studied in this article, and the best results were obtained with Bi2O3, SiO2 and Y2O 3.Abstract:
The effect of oxide additives-CuO, SiO2, Y2O3, Bi2O3 and ZnO in 1–10 mol% on the sintering and superconducting properties of YBa2Cu3O7 was studied. SEM studies indicated improvement of grain size and interconnectivity due to the additives, the best results being obtained with Bi2O3, SiO2 and Y2O3. The superconducting transition temperature is unaffected (92±2 K) even with 10 mol % of the additives. ZnO, however, decreases theT
c as expected.read more
Citations
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The structural and superconducting properties of the YBa2Cu3O7−δ‐HfO2 system
TL;DR: In this paper, a tetragonal to orthorhombic transformation has taken place within seconds, indicating that the rate of oxygen absorption has increased tremendously by HfO2 addition.
Journal ArticleDOI
Investigations of Bi substitution in NdBa2Cu3Oy
Lawrence Suchow,Jian Tang +1 more
TL;DR: In this paper, the authors explored the possibility of substituting Bi for Nd in orthorhombic NdBa2Cu3O676, a new cubic compound witha=0.8703 nm, and showed that a poorly crystallized oxygen-deficient form of this compound is already present prior to reheating.
References
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Journal ArticleDOI
Superconductivity at 93 K in a new mixed-phase Y-Ba-Cu-O compound system at ambient pressure
Maw-Kuen Wu,J. R. Ashburn,C. J. Torng,Pei-Herng Hor,R. L. Meng,Li Gao,Z. J. Huang,Yongmei Wang,Ching-Wu Chu +8 more
TL;DR: A stable and reproducible superconductivity transition between 80 and 93 K has been unambiguously observed both resistively and magnetically in a new Y-Ba-Cu-O compound system at ambient pressure.
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Bulk superconductivity at 91 K in single-phase oxygen-deficient perovskite Ba 2 YCu 3 O 9 − δ
Robert J. Cava,Bertram Batlogg,R. B. van Dover,Donald W. Murphy,Steven A. Sunshine,Theo Siegrist,J. P. Remeika,Edward A. Rietman,S. M. Zahurak,G. P. Espinosa +9 more
TL;DR: Observation de la transition supraconductrice a 91 K, sur 1,5 K and determination of the densite de courant critique, de l'effet Meissner, du champ critique, du parametre de Sommerfeld, de parametres GL.
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Evidence for superconductivity above 40 K in the La-Ba-Cu-O compound system.
TL;DR: An apparent superconducting transition with an onset temperature above 40 K has been detected under pressures in the La-Ba-Cu-O compound system synthesized directly from a solid-state reaction of La/sub 2/O/ sub 3/, CuO, and BaCO/sub 3/ followed by a decomposition of the mixture in a reduced atmosphere.
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Critical-current measurements in epitaxial films of YBa2Cu
TL;DR: The superconducting critical current in these films at 77 K is in excess of ${10}^{5}$ A/${\mathrm{cm}}^{2}$ and at 4.2 K in addition to this.