Berlin 2015 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 21: Superconductivity: Poster Session

TT 21.19: Poster

Montag, 16. März 2015, 15:00–18:00, Poster B

Phase diagrams of Ca(Fe,Ru)₂As₂ system — •Kan Zhao and Philipp Gegenwart — Experimentalphysik VI, Elektronische Korrelationen und Magnetismus, Institut für Physik, Universität Augsburg, D-86135 Augsburg, Germany

Single crystalline Ca(Fe,Ru)₂As₂ series have been grown and characterized by structural, magnetic, and transport measurements. These measurement shows Ca(Fe,Ru)₂As₂ undergoes successive phase transitions with increasing Ru element doping. The antiferromagnetic phase with orthorhombic structure at x<0.023 (x means the doping concentration of Ru element) is directly driven to a Fermi-liquid type collapsed tetragonal (cT) phase at 0.023<x<0.07, with no superconducting region between the two phase, consistent with the conclusion of CaFe₂As₂ under hydrostatic pressure.