Regensburg 2013 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 12: Poster Session Superconductivity
TT 12.43: Poster
Montag, 11. März 2013, 15:00–19:00, Poster D
Is there a 122 compound in the Ba-Fe-Sb system with ThCr2Si2 type structure? — •Daniel Schmidt, N. Kurz, and Hans F. Braun — Experimentalphysik V, Universität Bayreuth, D-95440 Bayreuth, Germany
The study of iron based superconductors has lead to the 122 iron pnictide compounds, that allow to investigate the interdependency of chemical doping and physical properties. Hole doping in BaFe2As2 was successfully achieved and transition temperatures of 38 K were obtained. Other doping procedures are possible, like the electron doping on the iron site and the isoelectronic substitution on the arsenic site. In our work we studied such an isoelectronic substitution of arsenic with the isovalent element Sb which has a larger ionic radius than arsenic. This way we induce chemical pressure in the compound. We tested the substitution level with X-ray powder diffraction measurements. The results of further measurements will be communicated.