Mössbauer spectroscopy of Hg-1223 superconductors

E. Kuzmann, M. Mair, G. Gritzner

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Doping of (Hg0.3Pb0.4)(Sr0.8Ba0.2) 2Ca2Cu3Oy superconductors with the Mössbauer nuclei 57Fe and 119Sn was investigated. Energy dispersive X-ray (EDX) analysis showed that 57Fe entered the superconducting phase. The introduction of Fe into the superconductor led to a decrease in the Tc(0)-values from 112 K for the undoped to 105 K for the Fe-doped phase. Low concentrations of Fe were also present in the Ca-Sr-Cu-O phase. Sn formed a separate secondary phase, predominately barium stannate with some Sr, Ca, Pb, Cu and low amounts of Fe. Small amounts of Sn were also present in the Sr-Ca-Cu-O secondary phase. The 57Fe Mössbauer spectra were interpreted under the assumption that Fe occupies the square pyramidal fivefold oxygen-coordinated Cu sites and the square planar fourfold oxygen-coordinated Cu sites in the superconducting phases. The 119Sn Mössbauer spectra mainly reflected the Sn environment in the Sn-rich secondary phase.

Original languageEnglish
Pages (from-to)45-54
Number of pages10
JournalPhysica C: Superconductivity and its Applications
Volume312
Issue number1-2
Publication statusPublished - Jan 20 1999

Fingerprint

Superconducting materials
Spectroscopy
Oxygen
stannates
Energy dispersive X ray analysis
oxygen
Barium
spectroscopy
barium
low concentrations
Doping (additives)
nuclei
x rays
energy

Keywords

  • Hg-1223 phase* Fe Mössbauer spectroscopy* Sn Mössbauer spectroscopy
  • Mercury-based superconductors

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Mössbauer spectroscopy of Hg-1223 superconductors. / Kuzmann, E.; Mair, M.; Gritzner, G.

In: Physica C: Superconductivity and its Applications, Vol. 312, No. 1-2, 20.01.1999, p. 45-54.

Research output: Contribution to journalArticle

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