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Plasma-enhanced fluorination of YBa2Cu3O7−δ ceramics

Part II Interaction mechanisms between the reactive species and the materials

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Abstract

Mechanisms of interaction between the reactive species of a (CF4+O2) plasma and YBa2Cu3O7−δ ceramics have been proposed through detailed angle-resolved X-ray photoelectron spectroscopic analyses. At the surface of the outer grains, the plasma treatment removes (OH)− and (CO3)2− species contained in the degradation layer and gives rise to a fluoride-rich layer, whereas in the bulk of the material the occurrence of metal-fluorine bonds in the superconducting phase has been assumed. An increase of the oxidation state of copper has been also detected, confirming the oxidizing effect of the plasma treatment. A comparison with the oxidation mechanisms obtained by fluorine gas treatment is proposed.

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Author notes

  1. N. Hudáková

    Present address: Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 04353, Košice, Slovakia

Authors and Affiliations

  1. Laboratoire de Chimie du Solide du CNRS, Université de Bordeaux I, 351, cours de la Libération, 33405, Talence Cedex, France

    C. Magro, A. Tressaud, N. Hudáková & J. Etournau

  2. Institut des Matériaux de Nantes, 2 rue de la Houssinière, 44072, Nantes Cedex 03, France

    C. Cardinaud & G. Turban

Authors
  1. C. Magro
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  2. A. Tressaud
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  3. N. Hudáková
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  4. J. Etournau
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  5. C. Cardinaud
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  6. G. Turban
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Magro, C., Tressaud, A., Hudáková, N. et al. Plasma-enhanced fluorination of YBa2Cu3O7−δ ceramics. JOURNAL OF MATERIALS SCIENCE 29, 4260–4267 (1994). https://doi.org/10.1007/BF00414208

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  • DOI: https://doi.org/10.1007/BF00414208

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