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Journal
2005 | 3 | 3 | 432-440
Article title

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

Content
Title variants
Languages of publication
EN
Abstracts
EN
The 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

Journal
Year
Volume
3
Issue
3
Pages
432-440
Physical description
Dates
published
1 - 9 - 2005
online
1 - 9 - 2005
Contributors
  • Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd., 1784, Sofia, Bulgaria
  • Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd., 1784, Sofia, Bulgaria, nedel@uctm.edu
  • Department of Analytical Chemistry, University of Chemical Technology and Metallurgy, 8 Kl. Ohridski, 1756, Sofia, Bulgaria
References
  • [1] K. Hatada and H. Shimizu: “Structural and superconducting properties of R1−x Cax Ba2Cu3O6+δ (R=Y, Er, Gd, Eu; 0<δ<1)”, Physica C, Vol. 304, (1998), pp. 89–95. http://dx.doi.org/10.1016/S0921-4534(98)00281-0
  • [2] P. Starowicz, J. Sokolowski, M. Balanda and A. Szytula: “The effect of calcium substitution in deoxygenated R1−x Cax Ba2Cu3O6.1 systems (R=Y, Eu): appearance of superconductivity, insulator to metal transition”, Physica C, Vol. 363, (2001), pp. 80–90. http://dx.doi.org/10.1016/S0921-4534(01)00628-1[Crossref]
  • [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 Ba2Cu3Oz bulk samples”, Physica C, Vol. 403, (2004), pp. 283–289. http://dx.doi.org/10.1016/j.physc.2004.01.002[Crossref]
  • [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 Ba2YCu3Ox ”, Physica C, Vol. 165, (1990), pp. 419–433. http://dx.doi.org/10.1016/0921-4534(90)90376-P[Crossref]
  • [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. http://dx.doi.org/10.1016/0921-4534(88)90071-8[Crossref]
  • [6] M. Oku, J. Kimura, Hosoya, K. Takada and K. Hirokawa: “Application of ferrous-chromate and iodometric titration for the determination of copper oxidation states in the superconductor YBa2Cu3Oy ”, Fresenius J. Anal. Chem., Vol. 332, (1988), pp. 237–341. http://dx.doi.org/10.1007/BF00492967[Crossref]
  • [7] T. Nedeltcheva: “Determination of oxygen stoichiometry in YBCO superconductors by spectrophotometry”, Anal. Chim. Acta, Vol. 312, (1995), pp. 223–226. http://dx.doi.org/10.1016/0003-2670(95)00237-T[Crossref]
  • [8] T. Nedelcheva and L. Vladimirova: “Spectrophotometric determination of oxygen stoichiometry in YBCO supeconducting bulk samples”, Anal. Chim. Acta, Vol. 437, (2001), pp. 259–263. http://dx.doi.org/10.1016/S0003-2670(01)01002-9[Crossref]
  • [9] L. Vladimirova, T. Nedeltcheva and A. Stoyanova-Ivanova: “Determination of oxygen stoichiometry in Y1−x Cax Ba2Cu3Oy superconducting bulk samples”, J. Univ. Chem. Tech. Met., Vol. 38, (2003), pp. 955–956.
  • [10] T. Nedelcheva and L. Vladimirova: “Study on the redox process between copper (II) and iodide ions in the presence of side reactions”, Bulg. Chem. and Industry, Vol. 72, (2001), pp. 18–24.
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.-psjd-doi-10_2478_BF02479273
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