AI 中文总结
受白云石矿物启发，提出化学策略制备等边三角形晶格磁体，以SnM(BO3)2为例合成并分析其结构，通过测量揭示反铁磁相互作用及奈尔温度，为探索阻挫磁性和低温磁热应用提供材料平台。
AI 中文摘要
等边三角形晶格磁体为探索奇异量子自旋现象提供了通用材料平台，其场可调磁熵为低温绝热去磁制冷带来机遇。受天然矿物启发，我们提出一种化学策略来制备等边三角形晶格磁体，利用大量白云石型材料的高晶体对称性。以白云石型材料SnM(BO3)2（M = Co、Mn）为例，合成后结构分析表明Co2+和Mn2+离子形成具有A - B - C堆叠方式的等边三角形晶格。通过磁化率和比热测量揭示了主要的反铁磁相互作用，SnCo(BO3)2和SnMn(BO3)2的奈尔温度分别为0.49K和0.96K。结果表明白云石型M'M(X)2系统是探索阻挫磁性和低温磁热应用的化学灵活且结构完美的材料平台。
英文摘要
Equilateral triangular lattice magnets provide a versatile materials platform for exploring exotic quantum spin phenomena, while their field-tunable magnetic entropy offers opportunities for low-temperature adiabatic demagnetization refrigeration. Inspired by the natural mineral, we proposed a chemical strategy to achieve equilateral TL magnets, leveraging the high crystal symmetry of a large family of dolomite-type materials. As typical examples, the dolomite-type materials SnM(BO3)2 (M = Co, Mn) were synthesized, and structural analysis reveals that Co2+ and Mn2+ ions form equilateral triangular lattices with an A-B-C stacking fashion. The magnetic susceptibilities and specific heat measurements reveal dominant antiferromagnetic interactions, with Neel temperatures of 0.49K for SnCo(BO3)2 and 0.96K for SnMn(BO3)2, respectively. Our results establish the dolomite-type M'M(X)2 (M'and M sites allow various valence states, e.g., +4/+2 or +3/+3; X = CO32- or BO33-) system as a chemically flexible and structurally perfect material platform for exploring frustrated magnetism and low-temperature magnetocaloric applications.
