Berlin 2018 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
TT: Fachverband Tiefe Temperaturen
TT 47: Frustrated Magnets - Iridates and Fe-based Materials
TT 47.11: Vortrag
Mittwoch, 14. März 2018, 12:15–12:30, H 0104
Interplay of structure and magnetism in frustrated intermetallic AFe4X2 systems — Inga Kraft1,2, Katharina Weber1,2, Christoph Bergmann1, Christoph Geibel1, and •Helge Rosner1 — 1Max Planck Institute for Chemical Physics of Solids, Dresden — 2Technical University of Dresden
Due to their complex and versatile behavior frustrated systems present great experimental and theoretical challenges. Even slight perturbations induce instabilities in such systems and prompt the emergence of unusual phenomena. The intermetallic AFe4X2 compounds (A=Sc,Y,Lu,Zr; X=Si,Ge) are suggested to cover the whole regime from frustrated AFM order up to an AFM quantum critical point. Our DFT calculations exhibit a strong interplay of structure and magnetism. However, according to our calculations, the structural and the magnetic phase transition can be considered as independent in reasonably good approximation. We discuss the influence of the A and X site atoms on the strength of magnetic interactions and the size of structural distortion.