Magnetism on ideal triangular lattices in NaBaYb(BO3)2

Guo, Shu; Ghasemi, A.; Broholm, C. L.; Cava, R. J.

doi:10.1103/physrevmaterials.3.094404

Magnetism on ideal triangular lattices in NaBaYb(BO₃)₂

Journal Article · Tue Sep 10 00:00:00 EDT 2019 · Physical Review Materials

DOI:https://doi.org/10.1103/physrevmaterials.3.094404· OSTI ID:1613185

Guo, Shu ^[1]; Ghasemi, A. ^[2]; Broholm, C. L. ^[2]; Cava, R. J. ^[3]

Princeton Univ., NJ (United States); DOE/OSTI
Johns Hopkins Univ., Baltimore, MD (United States)
Princeton Univ., NJ (United States)

We report the anisotropic magnetic properties of single crystals of the triangular lattice magnet NaBaYb(BO₃)₂. In this material, a layered [Yb(BO₃)₂]_∞ framework is sandwiched by Na⁺ or Ba²⁺ layers in alternation. The space group is centrosymmetric, R3¯m, with no detectable disorder and Yb³⁺-based easy axis Kramers doublets forming layered triangular lattice planes. A specific-heat anomaly indicates a second-order phase transition at T = 0.41(2)K that is suppressed to less than 0.15 K in a 0.1-T magnetic field. With a change in entropy of only 0.6(2)% of R ln 2 at this transition, NaBaYb(BO₃)₂, however, retains 94(1)% of R ln 2 entropy to the lowest temperature accessed (T = 0.15K). As a result, strong frustration and the potential for quantum magnetism are implied.

View Accepted Manuscript (DOE)

Research Organization:: Energy Frontier Research Centers (EFRC) (United States). Institute for Quantum Matter (IQM); Johns Hopkins Univ., Baltimore, MD (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC)

Grant/Contract Number:: SC0019331

OSTI ID:: 1613185

Alternate ID(s):: OSTI ID: 1831183

Journal Information:: Physical Review Materials, Journal Name: Physical Review Materials Journal Issue: 9 Vol. 3; ISSN 2475-9953

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Magnetism on ideal triangular lattices in NaBaYb(BO₃)₂