Dresden 2020 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 5: Frustrated Magnets - General 1 (joint session TT/MA)

TT 5.3: Vortrag

Montag, 16. März 2020, 10:00–10:15, HSZ 304

Magnetic interactions in the new double perovskite Nd2ZnIrO6, probed by Resonant Elastic X-ray Scattering (REXS) — •Florian Heinsch1,2, Morgan Allison2, Sonia Francoual3, Jochen Geck2, Florian Rasch4, Tobias Ritschel2, Quirin Stahl2, Raman Thiyagarajan1,2, Michael Vogl4, Eugen Weschke5, and Sabine Wurmehl41HZDR, Dresden, Germany — 2TU Dresden, Dresden, Germany — 3DESY, Hamburg, Germany — 4IFW, Dresden, Germany — 5HZB, Berlin, Germany

The unique interplay of spin-orbit coupling, crystal field splitting and Coulomb repulsion have made double perovskites of the general formula A2BB’O6 with a 5d transition metal sitting on the B’-site a subject of intense research. Recently a new series Ln2ZnIrO6 with Ln = Nd, Sm, Eu and Gd and Ir as 5d-elment could be synthesized [1]. In this series, Nd2ZnIrO6 stands out because of its particularly intriguing magnetic properties.

Here we present results of REXS experiments on a Nd2ZnIrO6 single crystal, conducted at P09 at PETRA III and UE46 PGM-1 at BESSY. The combined capabilities of both facilities provided us with temperature (down to -0.9ex~5K) and magnetic magnetic field (up to -0.9ex~13T) dependent data that elucidate the particularly strong correlation between the two magnetic sublattices of the Nd3+ and Ir4+ ions. An outlook will be given on how to put the found field dependent anisotropy in a comprehensive picture of the magnetic ground state of Nd2ZnIrO6 and how that relates to compounds with different Ln.

[1] M. Vogl et al., arXiv:1910.13552

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