发表机构
Southern University of Science and Technology; International Quantum Academy（南方科技大学; 国际量子科学院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文报道稀土双层三角晶格R2O2Se单晶系列，通过磁化率与比热测量揭示多种反铁磁基态及场致磁相，确立其为可调量子自旋态材料平台。
AI 中文摘要
稀土双层三角晶格（TL）反铁磁体通过结合几何阻挫、层间耦合和强单离子各向异性，为实现多样化的磁态提供了一个多功能平台。在此，我们报道了一系列具有双层等边三角晶格的R2O2Se（R = Sm, Eu, Tb-Lu；ROSe）单晶。磁化率和比热测量揭示了该系列中主要的反铁磁（AFM）相互作用和多样的磁性基态，包括TbOSe中的连续AFM相变以及SmOSe、DyOSe、HoOSe和YbOSe中的单一AFM相变。值得注意的是，DyOSe和HoOSe在沿c轴方向的磁场中表现出显著的1/2磁化平台状特征，揭示了场致磁态。在HoOSe中，互补的热力学和磁化测量解析出三个临界场和一个包含五种不同磁相的丰富的场-温度相图。这些结果确立了稀土双层三角晶格作为一个化学可调的材料平台，通过晶格几何、单离子各向异性和竞争磁相互作用的相互作用来获取新颖的量子自旋态。
英文摘要
Rare-earth bilayer triangular lattice (TL) antiferromagnets provide a versatile platform for realizing diverse magnetic states by combining geometric frustration, interlayer coupling, and strong single-ion anisotropy. Here, we report a family of R2O2Se (R = Sm, Eu, Tb-Lu; ROSe) single crystals featuring bilayer equilateral TLs. Magnetic susceptibility and specific-heat measurements reveal predominantly antiferromagnetic (AFM) interactions and diverse magnetic ground states across the series, including successive AFM transitions in TbOSe and single AFM transitions in SmOSe, DyOSe, HoOSe, and YbOSe. Notably, DyOSe and HoOSe exhibit pronounced 1/2 magnetization plateau-like features for fields along the c-axis, revealing field-induced magnetic states. In HoOSe, complementary thermodynamic and magnetization measurements resolve three critical fields and a rich field-temperature phase diagram containing five distinct magnetic phases. These results establish rare-earth bilayer TLs as a chemically tunable materials platform for accessing novel quantum spin states through the interplay of lattice geometry, single-ion anisotropy, and competing magnetic interactions.
Comments40 pages, 18 figures
