Dresden 2017 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 13: Superconductivity: Fe-based Superconductors - 122
TT 13.12: Vortrag
Montag, 20. März 2017, 18:00–18:15, HSZ 103
Crystal Growth and Characterization of BaTM2As2 with TM = 3d Transition Metal — •Sebastian Selter1, Rhea Kappenberger1,2, Francesco Scaravaggi1,2, Anja Wolter-Giraud1, Sabine Wurmehl1,2, Saicharan Aswartham1, and Bernd Büchner1,2 — 1IFW Dresden, Dresden, Germany — 2TU Dresden, Dresden, Germany
To understand the role of iron as transition metal in superconductivity and magnetism in BaTM2As2, a thorough investigation with different 3d transition metals is needed. With this aim, BaTM2As2 with TM = 3d transition metal are to be investigated for trends.
Here we present a comprehensive overview on synthesis and crystal growth of BaTM2As2 with TM = 3d transition metal.
BaCr2As2, BaMn2As2, BaCo2As2, BaNi2As2 and BaCu2As2 were grown by state-of-the-art flux growth techniques. To obtain large size homogeneous crystals of BaCr2As2 and BaCo2As2, the respective growth profiles were optimized using DTA and EDS. All compounds were characterized using EDS and PXRD. A nice trend can be seen for the behavior of lattice parameters and cell volume over the exchange of TM. Additionally, first magnetic measurements were performed, showing a strong influence of TM in BaTM2As2 on the magnetic ordering.