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Berlin 2018 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 72: Poster Session: Correlated Electrons

TT 72.36: Poster

Wednesday, March 14, 2018, 15:00–19:00, Poster B

Magnetic ground state of the cubic perovskite Ba3NiNb2O9 — •Sh. Yamamoto1, G. Aslan Cansever2, T. Gottschall1, M. Uhlarz1, C. G. F. Blum2, A. Wolter-Giraud2, S. Aswartham2, S. Wurmehl2, T. Herrmannsdörfer1, S. Seiro2, B. Büchner2, and J. Wosnitza11Hochfeld-Magnetlabor Dresden (HLD-EMFL), HZDR, Dresden, Germany — 2IFW-Dresden, Germany

We investigated the magnetic spin-1 perovskite Ba3NiNb2O9 by means of complex ac susceptibility measurements at extreme sample conditions. Ba3NiNb2O9 with cubic perovskite structure (Pm-3m) has a random occupation of Nb(66 %)/Ni(33 %) at the center of the cubic perovskite unit cell. Different from the isostoichiometric sister compound, Ba3NiNb2O9 with P-3m1 structure which shows both uud-spin configuration and multiferroicity, the magnetic properties of the investigated system have not been studied below 2 K yet. For our single crystals, we observe a spin freezing transition at around 0.7 K. Furthermore, the peak of χ’ is suppressed by applying an external dc field of 200 mT and χ” shows a sudden onset near the freezing temperature.

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