Mössbauer Spectroscopy Determination of Iron Foreign Phases in the Superconducting Systems; RAsFeO1−x, RAsFeO1−xFx, and Sr1−xKxFe2As2

Article

DOI: 10.1007/s10948-008-0333-0

Cite this article as:
Nowik, I. & Felner, I. J Supercond Nov Magn (2008) 21: 297. doi:10.1007/s10948-008-0333-0

Abstract

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 Mössbauer 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.

Keywords

Fe-As based superconductorsMossbauer spectroscopySpin density wavesImpurity phases

PACS

76.80.+y74.25.Dw75.20.En75.30.Fv

Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  1. 1.Racah Institute of PhysicsThe Hebrew UniversityJerusalemIsrael