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2007 | 5 | 3 | 398-404
Tytuł artykułu

Tl-based superconducting films prepared by aerosol spray deposition and thallinated in an open system

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Superconducting Tl-based films were prepared on a LaAlO3 single crystal substrate. Spray pyrolysis of Ba, Ca and Cu nitrate solutions was used for deposition of the precursor films. They were subsequently ex-situ thallinated in flowing oxygen (open system). While the superconducting Tl-2212 phase formed at an annealing temperature of 880°C, thallination at 900°C led to the formation of a Tl-2223 /Tl-2212 mixture. The amount of Tl-2223 increased with prolonged thallination, whereas the Tl-2212 phase progressively disappeared. Films prepared in such a manner were c-oriented and contained only low amounts of non-superconducting impurities. The resulting samples were characterized by XRD and SEM and their T C values were determined by resistive four-point measurements. They showed critical temperatures in the range of T ON = 125–135 K, T C0 = 91–93 K. Differences between the composition and properties of the obtained films and those thallinated in closed systems under 50 kPa of oxygen are discussed in this paper. Results show that the Tl-2212 → Tl-2223 transformation proceeds at a slower rate under flowing oxygen than in a closed system.
Wydawca

Czasopismo
Rocznik
Tom
5
Numer
3
Strony
398-404
Opis fizyczny
Daty
wydano
2007-09-01
online
2007-04-12
Twórcy
  • Department of Inorganic Chemistry, Faculty of Natural Sciences, Comenius University, SK-84215, Bratislava, Slovakia
  • Institute of Electrical Engineering, Slovak Academy of Science, SK-84104, Bratislava, Slovakia
  • Department of Inorganic Chemistry, Faculty of Natural Sciences, Comenius University, SK-84215, Bratislava, Slovakia, plesch@fns.uniba.sk
  • Institute of Electrical Engineering, Slovak Academy of Science, SK-84104, Bratislava, Slovakia
Bibliografia
  • [1] H. Nguyen Xuan, S. Beauquis, Ph. Galez, J.L. Jorda, S. Phok and D. De-Barros: “Texture of high temperature superconductor thick films Tl-1223 and Tl-2223/LaAlO3 deposited by spray pyrolysis”, Mater. Sci. Forum, Vol. 467-470, (2004), pp. 591–596. http://dx.doi.org/10.4028/www.scientific.net/MSF.467-470.591[Crossref]
  • [2] S. Phok, Ph. Galez, J.L. Jorda, D. De-Barros, C. Villard and F. Weiss: “Kinetics studies for the formation of Tl-1223 films prepared by spray pyrolysis”, Cryst. Eng., Vol. 5, (2002), pp. 401–410. http://dx.doi.org/10.1016/S1463-0184(02)00051-5[Crossref]
  • [3] G. Malandrino, A.M. Borzi, L. Perdicaro, I.L. Fragalà, A. Andreone, A. Cassinese, F. Palomba and G. Pica: “Properties of single-and double-sided Tl2Ba2CaCu2O8 films grown by MOCVD and their potencial applications to microwave devices”, Physica C, Vol. 341-348, (2000), pp. 2677–2678. http://dx.doi.org/10.1016/S0921-4534(00)01462-3[Crossref]
  • [4] Z.F. Ren, W. Li, D.Z. Wang, J.Y. Lao, J.H. Wang, M. Paranthaman, D.T. Verebelyi, D.K. Christen, D.F. Lee, A. Goyal and D.M. Kroeger: “In-plane aligned superconducting Tl0.78Bi0.22Sr1.6Ba0.4Ca2Cu3O9 films on rolling assisted biaxially textured substrates”, Physica C, Vol. 313, (1999), pp. 241–245. http://dx.doi.org/10.1016/S0921-4534(99)00018-0
  • [5] S.L. Yan, L. Fang, M. He, R.T. Lu, X.J. Zhao, X. Lu, Y.X. Jia, J.W. Wang and T.G. Zhou: “Tl2Ba2CaCu2O8 thin films on 2 in. LaAlO3 (001) substrates”, Cryogenics, Vol. 45, (2005), pp. 41–44. http://dx.doi.org/10.1016/j.cryogenics.2004.08.006
  • [6] M. Jergel, A. Conde Gallardo, C. Falcony Guajardo and V. Štrbík: “Tl-based superconductors for high-current, high-field applications”, Supercond. Sci Tech., Vol. 9, (1996), pp. 427–446. http://dx.doi.org/10.1088/0953-2048/9/6/001[Crossref]
  • [7] M. Jergel, F. Hanic, G. Plesch, V. Štrbík, J. Liday, C. Falcony-Guajardo, G.S. Contreras Puente: “Spray deposited Tl-Ba-Ca-Cu-O films and bulks subjected to a common anneal”, Supercond. Sci. Tech., Vol. 7, (1994), pp. 931–939. http://dx.doi.org/10.1088/0953-2048/7/12/009[Crossref]
  • [8] H. Nguyen Xuan, S. Beauquis, Ph. Galez, P. Chadouet, C. Jimenez, F. Weiss, M. Decroux, M. Therasse, V. Štrbík, M. Polák and Š. Chromik: “Tl-based superconducting films by spray pyrolysis and MOCVD”, J. Phys.: Conf. Ser., Vol. 43, (2006), pp. 281–284. http://dx.doi.org/10.1088/1742-6596/43/1/070[Crossref]
  • [9] H. Nguyen Xuan, S. Beauquis, H. Chunxue, J.L. Jorda and Ph. Galez: “Formation kinetics study of the Tl-2223 phase in bulk samples”, J. Phys.: Conf. Ser., Vol. 43, (2006), pp. 393–396. http://dx.doi.org/10.1088/1742-6596/43/1/098[Crossref]
  • [10] Z. Matkovičová, H. Nguyen Xuan, Ph. Galez, S. Beauquis, V. Štrbík and G. Plesch: “The influence of the reaction conditions on the formation of Tl-based superconducting films deposited by spray pyrolysis”, J. Phys. Chem. Solid., in press, available online on www.sciencedirect.com, DOI: 10.1016/j.jpcs.2006.12.013. [Crossref]
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_s11534-007-0015-8
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