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arXiv · 1811.01369

The trimer-based spin liquid candidate Ba4NbIr3O12

Loi T. Nguyen·R. J. Cava
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Abstract

Ba4NbIr3O12, a previously unreported material with a triangular planar geometry of Ir3O12 trimers, is described. Magnetic susceptibility measurements show no magnetic ordering down to 1.8 K despite the Curie-Weiss temperature of -13 K. The material has a very low effective magnetic moment of 0.80 {\mu}B/f.u. To look at the lower temperature behavior, the specific heat (Cp) was measured down to 0.35 K; it shows no indication of magnetic ordering and fitting a power law to Cp vs. T below 2 K yields the power {\alpha} = 3/4. Comparison to the previously unreported trimer compound made with the 4d element Rh in place of the 5d element Ir, Ba4NbRh3O12, is presented. The analysis suggests that Ba4NbIr3O12 is a candidate spin liquid material.

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Loi T. Nguyen, R. J. Cava. 2018-11-04. The trimer-based spin liquid candidate Ba4NbIr3O12. https://doi.org/10.1103/physrevmaterials.3.014412

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