کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1799324 | 1524843 | 2015 | 6 صفحه PDF | دانلود رایگان |
• 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.
Journal: Journal of Magnetism and Magnetic Materials - Volume 378, 15 March 2015, Pages 327–332