Article ID Journal Published Year Pages File Type
1799324 Journal of Magnetism and Magnetic Materials 2015 6 Pages PDF
Abstract

•Presence of two paramagnetic components reflecting the As/P coordination numbers was seen using Mössbauer spectroscopy•Using DFT calculations for the Fe centres the experimentally obtained Mössbauer parameters were verified.•Coexistence of spin-density-wave type magnetism and superconductivity was observed in low-temperature Mössbauer spectra.

The magnetic properties of the pnictide superconductors with the nominal composition of BaFe2(As0.68P0.32)2 and EuFe2(As0.8P0.2)2 were studied by 57Fe Mössbauer spectroscopy. A superconducting transition at 30 K was detected and coexistence of magnetism and superconductivity at low temperatures was observed. The Mössbauer spectra show two iron-atom surroundings, which are attributed to undoped AFe2As2 and substituted AFe2(As1−xPx)2, with at least one phosphorus atom in the tetragonal iron environment, (A = Ba or Eu). These two iron-atom surroundings were attributed to one macroscopic AFe2(As1−xPx)2 phase.

Related Topics
Physical Sciences and Engineering Physics and Astronomy Condensed Matter Physics
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