Spectrophotometric determination of oxygen content in calcium substituted RBCO (R=Eu, Gd, Er) superconductors-Reference-Cited by-同舟云学术

Spectrophotometric determination of oxygen content in calcium substituted RBCO (R=Eu, Gd, Er) superconductors

Published:2005-09-01 Issue:3 Volume:3 Page:432-440
ISSN:2391-5420
Container-title:Open Chemistry
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Author:

Stoyanova-Ivanova Angelina¹,Nedeltcheva Tsvetanka¹,Vladimirova Latinka²

Affiliation:

1. 1Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd., 1784, Sofia, Bulgaria

2. 2Department of Analytical Chemistry, University of Chemical Technology and Metallurgy, 8 Kl. Ohridski, 1756, Sofia, Bulgaria

Abstract

AbstractThe oxygen stoichiometry in R1−x CaxBa2Cu3Oy (R=Eu, Er, Gd; x=0, 0.2, 0.25, 0.3) superconducting bulk samples was determined spectrophotometrically. The dependence of the critical temperature on the y-oxygen coefficient and the x-coefficient of the included calcium was studied.

Publisher

Walter de Gruyter GmbH

Subject

Materials Chemistry,General Chemistry

Link

http://link.springer.com/content/pdf/10.2478/BF02479273.pdf

Reference10 articles.

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2. P. Starowicz, J. Sokolowski, M. Balanda and A. Szytula: “The effect of calcium substitution in deoxygenated R1−x Ca x Ba2Cu3O6.1 systems (R=Y, Eu): appearance of superconductivity, insulator to metal transition”, Physica C, Vol. 363, (2001), pp. 80–90.

3. E.K. Nazarova, A.J. Zaleski, A.L. Zahariev, A.K. Stoyanova-Ivanova and K.N. Zalamova: “Effects of substituting calcium for yttrium on the superconducting properties of Y Ba2Cu3O z bulk samples”, Physica C, Vol. 403, (2004), pp. 283–289.

4. R.J. Cava, A.W. Hewat, E.A. Hewat, B. Batlogg, M. Marezio, K.M. Rabe, J.J. Krajewski, W.F. Peck Jr. and L.W. Rupp Jr.: “Structural anomalies, oxygen ordering and superconductivity in oxygen deficient Ba2YCu3O x ”, Physica C, Vol. 165, (1990), pp. 419–433.

5. D.M. Deleeuw, C.A.H.A. Mutasers, Landereis H.C.A. Smoorenburg and P.J. Rommes: “Compounds and phase compatibilities in the system Y2O3−BaO−CuO at 950 °C”, Physica C, Vol. 152, (1988), pp. 39–49.

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