Physics – Condensed Matter – Superconductivity
Scientific paper
2008-06-25
Physics
Condensed Matter
Superconductivity
6 pagea and 7 figures
Scientific paper
The recently discovered superconducting - spin density wave materials, containing Fe and As, have raised huge interest. However most materials prepared to date, suffer from a varying degree of content of foreign Fe-As phases, Fe2As, FeAs2 and FeAs, which can lead to wrong conclusions concerning the properties of these materials. We show here that Mossbauer Spectroscopy is able to determine quite easily the relative content of the foreign phases. This procedure is demonstrated by a study of seven samples of superconducting or spin density wave materials, prepared in three different laboratories.
Felner Israel
Nowik Israel
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