Determination of foreign phases in Fe-As based superconducting systems

Israel Felner*, Israel Nowik, Bing Lv, Joshua H. Tapp, Zhongjia Tang, Arnold M. Guloy

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

The recently discovered superconducting materials, containing Fe and As, have raised huge interest. However most materials prepared to date, suffer from a varying degree of content of foreign phases, Fe2As, FeAs 2 and FeAs, which can lead to wrong conclusions concerning the properties of these materials. Mössbauer Spectroscopy determines quite easily the relative content of the foreign phases. This procedure is demonstrated by a study of eight samples of three Fe-As based families of materials, RAsFeO1∈-∈x F x , Sr 1∈-∈x K x Fe2As2 and LiFeAs, prepared in three different laboratories.

Original languageEnglish
Pages (from-to)61-65
Number of pages5
JournalHyperfine Interactions
Volume191
Issue number1-3
DOIs
StatePublished - Jun 2009

Keywords

  • Fe-As based superconductors
  • Impurity phases
  • Mössbauer Spectroscopy
  • Spin density waves

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