Ba9RE2(SiO4)6 (RE = Ho–Yb): A Family of Rare-Earth-Based Honeycomb-Lattice Magnets

Liu, Andi; Song, Fangyuan; Bu, Huanpeng; Li, Zhaohu; Ashtar, Malik; Qin, Yuqi; Liu, Dingjun; Xia, Zhengcai; Li, Jingxin; Zhang, Zhitao; Tong, Wei; Guo, Hanjie; Tian, Zhaoming

doi:10.1021/acs.inorgchem.3c01693

Cited by 5 publications

(3 citation statements)

References 55 publications

(99 reference statements)

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“…The Ba 6 Nd 2 Ti 4 O 17 single crystal was grown by the hightemperature flux method using BaCl 2 as flux, similar to the previous descriptions. 22 The mixtures of Ba 6 Nd 2 Ti 4 O 17 polycrystalline powders and BaCl 2 flux with a ratio of 1:15 were placed in a 50-mL platinum crucible and then heated to 1250 °C for 24 h to ensure homogeneous melting. Then, the temperature of the furnace was cooled slowly to 800 °C at a rate of 3 °C/h and finally cooled down to room temperature.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Ba₆RE₂Ti₄O₁₇ (RE = Nd, Sm, Gd, Dy–Yb): A Family of Rare-Earth-Based Layered Triangular Lattice Magnets

Song,

Liu,

Chen

et al. 2024

Inorg. Chem.

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The exploration of new rare-earth (RE)-based triangular-lattice materials plays a significant role in motivating the discovery of exotic magnetic states. Herein, we report a family of hexagonal perovskite compounds Ba 6 RE 2 Ti 4 O 17 (RE = Nd, Sm, Gd, Dy−Yb) with a space group of P6 3 /mmc, where magnetic RE 3+ ions are distributed on the parallel triangular-lattice layers within the ab-plane and stacked in an 'AA'-type fashion along the c-axis. The lowtemperature magnetic characterizations indicate that all synthesized Ba 6 RE 2 Ti 4 O 17 compounds exhibit dominant antiferromagnetic (AFM) interactions and the absence of magnetic order down to 1.8 K. The isothermal magnetization and electron spin resonance results reveal the distinct magnetic anisotropy for the compounds with different RE ions. Moreover, the as-grown Ba 6 Nd 2 Ti 4 O 17 single crystals exhibit Ising-like magnetic anisotropy with a magnetic easy-axis perpendicular to the triangle-lattice plane and no long-range magnetic order down to 80 mK, as the quantum spin liquid candidate with dominant Ising-type interactions.

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Section: ■ Experimental Sectionmentioning

confidence: 99%

Ba₆RE₂Ti₄O₁₇ (RE = Nd, Sm, Gd, Dy–Yb): A Family of Rare-Earth-Based Layered Triangular Lattice Magnets

Song,

Liu,

Chen

et al. 2024

Inorg. Chem.

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“…This multisite ligand structure could provide suitable doping sites for many RE ions. The trivalent praseodymium (Pr 3+ ) ion possesses a unique 4f 2 structure and many kinds of potential transition channels in the visible and infrared spectral regions. 17−19 When the Pr 3+ ion is doped into Y 2 SiO 5 crystals, an energy-level transition of 3 H 4 → 1 D 2 can be activated.…”

Section: Introductionmentioning

confidence: 99%

“…Rare-earth (RE)-doped crystals play a pivotal role in the development of emitting optics and luminescent materials. − Due to the generous optical spectrum and transitions lines of 4f electrons, the RE ion-doped crystals are widely used in photoluminescence, X-ray imaging, optical communication, and medical diagnosis. − The yttrium silicate (Y 2 SiO 5 ) crystal is first synthesized by Warshaw and Roy . It is a vital laser host crystal that has attracted wide attention.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Determination of the Electronic Structures and Energy-Level Splitting for Pr³⁺-Doped Y₂SiO₅ Crystals

Ji,

Ju,

Yuan

et al. 2024

J. Phys. Chem. A

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Trivalent praseodymium (Pr3+)-doped yttrium silicate (Y2SiO5) crystals have been widely used in various phosphors owing to their excellent luminescence characteristics. Although a series of studies have been carried out on its application prospects, the electronic structures and energy-transfer mechanisms of Pr3+-doped Y2SiO5 (Y2SiO5:Pr) remain an exploratory topic. Herein, the crystal structure analysis by the particle swarm optimization structure search method is used to study the structural evolution of Y2SiO5:Pr. Two novel structures with local [PrO7]−11 and [PrO6]−9 [Y2SiO5:Pr (I) and Y2SiO5:Pr (II)] are successfully identified. The impurity Pr3+ ions occupy the Y3+ sites and successfully integrate into the Y2SiO5 host crystal with a Pr3+ concentration of 6.25%. The calculated electronic band structures show that the doping of Pr3+ induces a reduction in band gaps for the host Y2SiO5 crystal. The conduction bands near the Fermi level are completely composed of f states. For the atomic energies of Pr3+ in Y2SiO5, the Stark levels and transitions are properly simulated based on a new set of crystal field parameters (CFPs) at the C 1 site symmetry. A satisfactory r.m.s. dev. of 15.57 cm–1 with 9 free ion parameters (plus 27 fixed CFPs as obtained from ab initio calculation) fitted to the 33 observed levels is obtained for the first time. The plentiful energy-level transition lines, from the visible light to the near-infrared region, are deciphered for Pr3+ in Y2SiO5. Blue 3P0 → 3H4 at 465 nm is calculated to be a strong emission line, and it might be an ideal channel for laser actions. These results could not only provide important insights into the rare-earth-doped crystals but also lay the foundation for future research studies of designing the new laser materials.

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Structure and Magnetic Properties of a Family of Two-Leg Spin Ladder Compounds Ba₂RE₂Ge₄O₁₃ (RE = Pr, Nd, and Gd–Ho)

Zhou,

Liu,

Song

et al. 2024

Inorg. Chem.

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Compared with the intensive investigation on 3d transition metal (TM)-based spin ladder compounds, less attention has been paid to the ones constructed by rare earth (RE) ions. Herein, we report a family of RE-based spin ladder compounds Ba 2 RE 2 Ge 4 O 13 (RE = Pr, Nd, Gd−Ho) crystallized into a monoclinic structure with the space group C2/c. The RE ions are arranged on a two-leg spin ladder motif along the b-axis, where the rung and leg exchange interactions are bridged via RE−O−RE pathways and RE−O−Ge−O−RE routes, respectively. Moreover, the much shorter rung distance in RE 2 O 12 dimer units than the leg distance suggests that Ba 2 RE 2 Ge 4 O 13 compounds are strong-rung spin ladder systems. All of the synthesized Ba 2 RE 2 Ge 4 O 13 (RE = Pr, Nd, Gd−Ho) compounds exhibit dominant antiferromagnetic (AFM) interactions and the absence of magnetic order down to 1.8 K. Among the family members, Ba 2 Dy 2 Ge 4 O 13 can be described by J eff = 1/2 Kramers doublet states, and the low-temperature specific heat indicates the coexistence of the spin-dimerized state with a broad maximum at ∼2.4 K and long-range AFM order with T N = 0.81 K. This family of Ba 2 RE 2 Ge 4 O 13 compounds thereby provides a rare platform to investigate the novel spin ladder physics constructed by 4f electrons.

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Ba₉RE₂(SiO₄)₆ (RE = Ho–Yb): A Family of Rare-Earth-Based Honeycomb-Lattice Magnets

Cited by 5 publications

References 55 publications

Ba₆RE₂Ti₄O₁₇ (RE = Nd, Sm, Gd, Dy–Yb): A Family of Rare-Earth-Based Layered Triangular Lattice Magnets

Ba₆RE₂Ti₄O₁₇ (RE = Nd, Sm, Gd, Dy–Yb): A Family of Rare-Earth-Based Layered Triangular Lattice Magnets

Theoretical Determination of the Electronic Structures and Energy-Level Splitting for Pr³⁺-Doped Y₂SiO₅ Crystals

Structure and Magnetic Properties of a Family of Two-Leg Spin Ladder Compounds Ba₂RE₂Ge₄O₁₃ (RE = Pr, Nd, and Gd–Ho)

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Ba9RE2(SiO4)6 (RE = Ho–Yb): A Family of Rare-Earth-Based Honeycomb-Lattice Magnets

Cited by 5 publications

References 55 publications

Ba6RE2Ti4O17 (RE = Nd, Sm, Gd, Dy–Yb): A Family of Rare-Earth-Based Layered Triangular Lattice Magnets

Ba6RE2Ti4O17 (RE = Nd, Sm, Gd, Dy–Yb): A Family of Rare-Earth-Based Layered Triangular Lattice Magnets

Theoretical Determination of the Electronic Structures and Energy-Level Splitting for Pr3+-Doped Y2SiO5 Crystals

Structure and Magnetic Properties of a Family of Two-Leg Spin Ladder Compounds Ba2RE2Ge4O13 (RE = Pr, Nd, and Gd–Ho)

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Ba₉RE₂(SiO₄)₆ (RE = Ho–Yb): A Family of Rare-Earth-Based Honeycomb-Lattice Magnets

Ba₆RE₂Ti₄O₁₇ (RE = Nd, Sm, Gd, Dy–Yb): A Family of Rare-Earth-Based Layered Triangular Lattice Magnets

Ba₆RE₂Ti₄O₁₇ (RE = Nd, Sm, Gd, Dy–Yb): A Family of Rare-Earth-Based Layered Triangular Lattice Magnets

Theoretical Determination of the Electronic Structures and Energy-Level Splitting for Pr³⁺-Doped Y₂SiO₅ Crystals

Structure and Magnetic Properties of a Family of Two-Leg Spin Ladder Compounds Ba₂RE₂Ge₄O₁₃ (RE = Pr, Nd, and Gd–Ho)