Mössbauer study of (Bi,Pb)-2223 superconductors irradiated with 86Kr ions

S. Stichleutner, E. Kuzmann, Z. Homonnay, Z. Klencsár, A. Vértes, K. Havancsák, W. T. König, O. Heiml, G. Gritzner

Research output: Contribution to journalArticle

Abstract

57Fe Mössbauer spectroscopy was used to study the effects of heavy ion irradiation on (Bi 0.93Pb 0.17)Sr 1.9Ca 2.05(Cu 1.02Fe 0.01) 3O y superconductors. The Mössbauer spectra of the irradiated superconductor showed significant changes in the subspectra belonging to different Cu microenvironments into which Fe ions were substituted. The relative occurrence of Fe occupying the square pyramidal fivefold oxygen coordinated Cu sites decreased while Fe 3+ substituting the square planar fourfold oxygen coordinated Cu sites increased upon bombardment by 246 MeV 86Kr 8+ ions. This observation was interpreted on the basis of partial replacement of the apical oxygen atoms in the square pyramids surrounding one of the Cu sites. Such oxygen vacancies create additional square planar coordination sites for Cu. These results also support the covalent character of Cu-O bonds in the superconducting layer as well as the ionic character of bond of apical oxygen to Cu.

Original languageEnglish
Pages (from-to)133-135
Number of pages3
JournalJournal of Radioanalytical and Nuclear Chemistry
Volume261
Issue number1
DOIs
Publication statusPublished - 2004

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Superconducting materials
Ions
Oxygen
Heavy Ions
Oxygen vacancies
Ion bombardment
Heavy ions
Spectroscopy
Spectrum Analysis
Atoms
Superconductivity

ASJC Scopus subject areas

  • Analytical Chemistry
  • Inorganic Chemistry
  • Nuclear Energy and Engineering

Cite this

Mössbauer study of (Bi,Pb)-2223 superconductors irradiated with 86Kr ions. / Stichleutner, S.; Kuzmann, E.; Homonnay, Z.; Klencsár, Z.; Vértes, A.; Havancsák, K.; König, W. T.; Heiml, O.; Gritzner, G.

In: Journal of Radioanalytical and Nuclear Chemistry, Vol. 261, No. 1, 2004, p. 133-135.

Research output: Contribution to journalArticle

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AU - Kuzmann, E.

AU - Homonnay, Z.

AU - Klencsár, Z.

AU - Vértes, A.

AU - Havancsák, K.

AU - König, W. T.

AU - Heiml, O.

AU - Gritzner, G.

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AB - 57Fe Mössbauer spectroscopy was used to study the effects of heavy ion irradiation on (Bi 0.93Pb 0.17)Sr 1.9Ca 2.05(Cu 1.02Fe 0.01) 3O y superconductors. The Mössbauer spectra of the irradiated superconductor showed significant changes in the subspectra belonging to different Cu microenvironments into which Fe ions were substituted. The relative occurrence of Fe occupying the square pyramidal fivefold oxygen coordinated Cu sites decreased while Fe 3+ substituting the square planar fourfold oxygen coordinated Cu sites increased upon bombardment by 246 MeV 86Kr 8+ ions. This observation was interpreted on the basis of partial replacement of the apical oxygen atoms in the square pyramids surrounding one of the Cu sites. Such oxygen vacancies create additional square planar coordination sites for Cu. These results also support the covalent character of Cu-O bonds in the superconducting layer as well as the ionic character of bond of apical oxygen to Cu.

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