2018/11/04 by Loi T. Nguyen, R. J. Cava · 28 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Ferromagnetism #Magnetic and transport properties of perovskites and related materials #Magnetic moment #Magnetic susceptibility #Paramagnetism #Physics of Superconductivity and Magnetism #Planar #Spin (aerodynamics) #Trimer #cond-mat.str-el
paper · pdf · doi:10.1103/physrevmaterials.3.014412
published in Physical Review Materials 3(1) (American Physical Society) · 19 pages, 7 main figures, 2 SI figures
arxiv created 2018/11/04 · openalex publication_date 2019/01/23 · arxiv updated 2019/01/30 · openalex created_date 2019/06/27 · openalex updated_date 2026/08/05
Ba4NbIr3O12, a material with a triangular planar geometry of Ir3O12 trimers, is described. Magnetic susceptibility measurements show it to be paramagnetic with no magnetic ordering down to 1.8 K despite the Curie-Weiss temperature (\ensuremathθCW) of \ensuremath-13 K. The material has a very low effective magnetic moment (\ensuremathμeff) of 0.80 \ensuremathμB/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 \ensuremathα=3/4. Comparison to the trimer compound made with the 4d element Rh in place of the 5d element Ir, Ba4NbRh3O12, which is also paramagnetic (\ensuremathμeff\phantom\rule0.16em0ex=1.48\ensuremathμB/f.u., \ensuremathθCW=\ensuremath-23\phantom\rule0.16em0exK), is presented. The analysis suggests that Ba4NbIr3O12 is a candidate spin liquid material.