Widely spaced planes of magnetic dimers in the Ba6Y2Rh2Ti2O17−𝛿 hexagonal perovskite
Author(s): Nguyen, Loi T; Straus, Daniel B; Zhang, Q; Cava, Robert J
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Abstract: | We report the synthesis and initial characterization of Ba6Y2Rh2Ti2O17−𝛿, a previously unreported material, to the best of our knowledge, with a hexagonal symmetry structure. Face-sharing RhO6 octahedra form triangular planes of Rh2O9 dimers that are widely separated in the perpendicular direction. The material displays a small effective magnetic moment, due to the Rh ions present, and a negative Curie-Weiss temperature. The charge transport and optical band gaps are very similar, near 0.16 eV. A large upturn in the heat capacity at temperatures below 1 K, suppressed by applied magnetic fields larger than 𝜇0H=2T, is observed. A large T-linear term in the specific heat (𝛾=166mJ/molf.uK2) is seen, although the material is insulating at low temperatures. These results suggest the possibility of a spin liquid ground state in this material. |
Publication Date: | 31-Mar-2021 |
Electronic Publication Date: | 31-Mar-2021 |
Citation: | Nguyen, Loi T, Straus, Daniel B, Zhang, Q, Cava, RJ. (2021) Widely spaced planes of magnetic dimers in the Ba6Y2Rh2Ti2O17−𝛿 hexagonal perovskite. Physical Review Materials, 5 (3), 10.1103/physrevmaterials.5.034419 |
DOI: | doi:10.1103/physrevmaterials.5.034419 |
EISSN: | 2475-9953 |
Language: | en |
Type of Material: | Journal Article |
Journal/Proceeding Title: | Physical Review Materials |
Version: | Author's manuscript |
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