Regensburg 2022 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

MA: Fachverband Magnetismus

MA 16: Frustrated Magnets

MA 16.10: Vortrag

Dienstag, 6. September 2022, 17:15–17:30, H37

Resonant X-ray and neutron investigation of the double perovskite Nd_2ZnIrO_6 — •Fabian Stier, Marein Rahn, and Jochen Geck — Institut für Material- und Festkörperphysik, TU Dresden, Deutschland

We present a study of the magnetic order in the double perovskite Nd_2ZnIrO6 as a function of temperature and magnetic field. This material contains Ir with a formal valence of 4+, which is is very often described in terms of localized j=1/2 states. The magnetism of such j=1/2 states has attracted much attention, especially in relation to the possible formation of quantum spin liquids in actual materials. In order to elucidate the magnetism of the Nd 4f- and the Ir 5d-electrons in Nd2ZnIrO6, we performed resonant magnetic x-ray scattering and neutron powder diffraction. Below T_N=15 K we observe magnetic order with propagation vector (0.5 0.5 0) and moments in the ab plane. The temperature dependence reveals the Ir moment as the driving force of the magnetic ordering below T_N. Applying a magnetic field along the crystallographic a-direction at T=5K causes a metamagnetic transition to a phase with a propagation vector (0 0 0). Interestingly, applying the magnetic field along the crystallographic c-direction shows a linear field dependence.