Regensburg 2016 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 19: Superconductivity: Poster Session
TT 19.18: Poster
Montag, 7. März 2016, 15:00–18:00, Poster D
Crystal growth and characterization of SrFe2(As1−xPx)2 — •Fryni Baglatzi, Agnes Adamski, and Cornelius Krellner — Physikalisches Institut, Goethe Universität Frankfurt am Main, D-60438, Frankfurt am Main
The discovery of iron-based superconductors brought new excitement to the field of unconventional superconducting (SC). Most studied are the so called (122 compounds), the AFe2As2 with A=Ba, Sr or Ca . An important point is, that different substitution series reveal different temperature-concentration phase diagrams, including varying SC order parameters and coexistence regions of magnetism and SC.
The crystal growth of SrFe2As2 can be achieved by using the self-flux technique. However, exact melting temperatures of various flux to composition ratios are not reported in literature. We determined the melting points for various flux concentrations, using differential thermal analysis (DTA) in order to find out the pseudo binary phase diagram. Furthermore, crystal growth was conducted on the phosphorous doped series. Our samples were analyzed with scanning electron microscope, energy dispersive x-ray analysis and powder diffractometry, in order to determine the phase relations and distribution coefficients.