Regensburg 2019 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 15: Superconductivity: Fe-based Superconductors - Other Materials and Theory

TT 15.2: Vortrag

Montag, 1. April 2019, 15:15–15:30, H23

Magnetic order and superconductivity in RbEuFe4As4 — •Noah Winterhalter-Stocker1, Stefan Gorol1, Stevan Arsenijevic2, Yurii Skourski2, Hans-Albrecht Krug von Nidda3, Mamoun Hemmida3, Anton Jesche1, Veronika Fritsch1, and Philipp Gegenwart11Experimental Physics VI, Center for Electronic Correlations and Magnetism, University of Augsburg, Germany — 2Hochfeld-Magnetlabor Dresden (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany — 3Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg, Germany

RbEuFe4As4 is an ordered member of the class of iron based superconductors with a structure similar to half doped 122 iron based superconductors like Ca0.5Na0.5Fe2As2. In contrast to the latter RbEuFe4As4 shows a superstructure with distinct Eu and Rb positions. The material shows a superconducting transition at Tc=36.8 K and an onset of magnetic order of the paramagnetic Eu 4f moments at Tm=15 K [1]. This leads to a unique interplay between magnetic order and superconductivity which we study by magnetization, magnetotransport and ESR measurements. Our analysis reveals the temperature dependence of the lower and upper critical fields which we compare to appropriate theoretical models.
M. P. Smylie et al., Phys. Rev. B 98, 104503 (2018)

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