Regensburg 2013 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 12: Poster Session Superconductivity
TT 12.28: Poster
Montag, 11. März 2013, 15:00–19:00, Poster D
Experimental setup for magneto-optical measurements on iron pnictides — •David Neubauer, Sina Zapf, Shuai Jiang, Dan Wu, and Martin Dressel — 1. Physikalisches Institut, Universität Stuttgart, Germany
The role of magnetism for high-Tc superconductivity is still under hot debate. EuFe2(As1−xPx)2 is a peculiar member of the iron pnictides, as it shows a local ordering of the Eu2+ moments at low temperatures (≈ 20K) besides the Fe2+ spin density wave. This leads to exceptional phenomena such as the re-entrance of superconductivity below the Eu magnetic ordering temperature or field induced superconductivity. Magneto-optical measurements on EuFe2(As1−xPx)2 will give further insight to the role magnetism plays on the electronic properties of iron pnictides. We are currently setting up an experiment combining the 12T “Spectromag 4000” (Oxford Instruments) with the “IFS 113v ” spectrometer (Bruker). The setup will also allow in situ gold evaporation in order to account for surface roughness. We present the overall setup and discuss the design of a stage for optical access to the magnet in Voigt- and Faraday-geometry.