Spiral Spin Liquid in a Frustrated Honeycomb Antiferromagnet: A Single-Crystal Study of GdZnPO.

The frustrated honeycomb spin model can stabilize a subextensively degenerate spiral spin liquid with nontrivial topological excitations and defects, but its material realization remains rare. Here, we report the experimental realization of this model in the structurally disorder-free compound GdZnPO. Using a single-crystal sample, we find that spin-7/2 rare-earth Gd^{3+} ions form a honeycomb lattice with dominant second-nearest-neighbor antiferromagnetic and first-nearest-neighbor ferromagnetic couplings, along with easy-plane single-site anisotropy.

Frustrated magnetism of the spin-1 kagome antiferromagnet-BaNi(VO)(OH).

We propose the newly synthesized-BaNi(VO)(OH)(space group:R3‾m) as a candidate for the spin-1 kagome Heisenberg antiferromagnet (KHA). The compound features a uniform kagome lattice of Ni(= 1) ions with a large interlayer distance. High-field measurements at low temperatures reveal a susceptibility local minimum at ∼9 T, resembling a 1/3 magnetization plateau as predicted by the pure= 1 KHA model.

Structure and Magnetic Properties of Melilite-Type Compounds REBeGeO (RE = Pr, Nd, Gd-Yb) with Rare-Earth Ions on Shastry-Sutherland Lattice.

Rare-earth (RE)-based frustrated magnets, such as typical systems of combining strong spin-orbit coupling (SOC), geometric frustration, and anisotropic exchange interaction, can give rise to diverse exotic magnetic ground states such as quantum spin liquid. The discovery of new RE-based frustrated materials is crucial for exploring the exotic magnetic phases. Herein, we report the synthesis, structure, and magnetic properties of a family of melilite-type REBeGeO (RE = Pr, Nd, and Gd-Yb) compounds crystallized in a tetragonal 4̅2 structure, where magnetic RE ions lay out on the Shastry-Sutherland lattice (SSL) within the plane and are well separated by nonmagnetic [GeBeO] polyhedrons along the -axis.

A comparative study on magnetic order and field-induced magnetic transition in double perovskite iridates: REZnIrOand REMgIrO(RE = Pr, Nd, Sm, Eu, Gd).

We perform a comparative magnetic study on two series of rare-earth (RE) based double perovskite iridates REBIrO(RE = Pr, Nd, Sm-Gd; B = Zn, Mg), which show Mott insulating state with tunable charge energy gap from ∼330 meV to ∼560 meV by changing RE cations. For nonmagnetic RE = Eu cations, EuMgIrOshows antiferromagnetic (AFM) order and field-induced spin-flop transitions below Néel temperature () in comparison with the ferromagnetic (FM)-like behaviors of EuZnIrOat low temperatures. For magnetic-moment-containing RE ions, GdBIrOshow contrasting magnetic behaviors with FM-like transition (B = Zn) and AFM order (B = Mg), respectively.

A New Family of Disorder-Free Rare-Earth-Based Kagome Lattice Magnets: Structure and Magnetic Characterizations of REBWO (RE = Pr, Nd, Gd-Ho) Boratotungstates.

Exploration of rare-earth (RE)-based Kagomé lattice magnets with spin-orbital entangled = 1/2 moments will provide a new platform for investigating the exotic magnetic phases. Here, we report a new family of REBWO (RE = Pr,Nd,Gd-Ho) boratotungstates with magnetic RE ions arranged on Kagomé lattice and perform its structure and magnetic characterizations. These serial compounds crystallize in a hexagonal coordinated structure with space group 6 (no.