Mössbauer study of Tl containing high Tc superconductors

E. Kuzmann, Z. Homonnay, A. Vértes, L. Bottyán, I. Kirschner, I. Halász, J. Bánkuti, L. Korecz, J. Dengler

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Mössbauer spectroscopy, X-ray diffractometry, ESR and electrical resistivity measurements, were used to study high Tc (above 100 K) superconducting materials in order to get information about the effect of the preparation circumstances as well as about the anomalous behaviour in57Fe and119Sn doped TlBaCaCu(57Fe)O4.5+δ and TlBaCuCu(119Sn)O4.5+δ superconductors. We have found that the Mössbauer parameters strongly depend on the preparation circumstances. In many cases the presence of Mössbauer lines of nonsuperconducting oxide phases indicated that the iron and tin could not entirely built in into the lattice of superconductor. Four valence state tin and four valence state iron sites were identified in the superconducting phases. We have found anomalous temperature dependent changes in the57Fe Mössbauer spectra of TlBaCaCu(57Fe)O4.5+δ samples around the Tc between 105-135 K. In this temperature range the total area of the spectrum temporary increases.

Original languageEnglish
Pages (from-to)1331-1335
Number of pages5
JournalHyperfine Interactions
Volume55
Issue number1-4
DOIs
Publication statusPublished - Jul 1 1990

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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