Berlin 2018 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 98: Poster Session: Superconductivity
TT 98.14: Poster
Thursday, March 15, 2018, 15:00–19:00, Poster B
Crystal growth of the iron pnictide superconductor NdFeAsO1−xFx — •Marius Peters, Mahmoud Abdel-Hafiez, Abanoub Refat Hanna, and Cornelius Krellner — Goethe-Universität Frankfurt
The single crystal growth of the iron pnictide superconductor
NdFeAsO in a NaCl/KCl-salt flux at ambient pressure has been improved optimizing growth temperature settings and profiles and developing a new growth geometry. Single crystaline samples of the 1111-system NdFeAsO1−xFx were investigated with structural, magnetic and transport methods and are in overall agreement with the polycrystalline material [1,2]. For lower doping levels (up to about x = 0.1) the system shows a spin density wave transition (below 154 K), which is suppressed strongly with increased doping, and with higher doping levels yields unconventional superconductivity (TC = 50 K for x = 0.2) [3]. We will present details of the optimization procedure of the crystal growth together with structural and magnetic characterization down to 2 K.
A.Marcinkova et al., Chemistry of Materials 21, 2967 (2009)
G.Lamura et al., Phys.Rev.B 91, 024513 (2015)
A. Adamski et al., Phys. Rev. B 96, 100503(R) (2017)