Trimer-based spin liquid candidate $\mathrm{B}{\mathrm{a}}_4\mathrm{NbI}{\mathrm{r}}_3{\mathrm{O}}_{12}$

Journal Article · 22 January 2019 · Physical Review Materials

DOI: https://doi.org/10.1103/physrevmaterials.3.014412 · OSTI ID:1566699

Nguyen, Loi T. ^[1]; Cava, R. J. ^[1]

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1. Princeton Univ., NJ (United States). Dept. of Chemistry

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 (θ_CW) of -13 K. The material has a very low effective magnetic moment (μeff) of 0.80 μ_B/f.u. To look at the lower-temperature behavior, the specific heat (C_p) was measured down to 0.35 K; it shows no indication of magnetic ordering and fitting a power law to C_p vs T below 2 K yields the power α = 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 (μ_eff = 1.48μ_B/f.u., θ_CW = -23K), is presented. Furthermore, the analysis suggests that Ba₄NbIr₃O₁₂ is a candidate spin liquid material.

• Research Organization: Energy Frontier Research Centers (EFRC) (United States). Institute for Quantum Matter (IQM); Johns Hopkins Univ., Baltimore, MD (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES)
• Grant/Contract Number: SC0019331
• OSTI ID: 1566699
• Journal Information: Physical Review Materials, Journal Name: Physical Review Materials Journal Issue: 1 Vol. 3; ISSN PRMHAR; ISSN 2475-9953
• Publisher: American Physical Society (APS)Copyright Statement
• Country of Publication: United States
• Language: English