标题： 自旋-1/2链化合物AgCuVO$_4$中由于链间相互作用受挫而产生的不可公度磁序 显示英文标题

标题： Incommensurate magnetic order arising from frustrated interchain interactions in the spin-1/2 chain compound AgCuVO$_4$

摘要： 量子自旋链中的竞争相互作用提供了一个平台，其中低维性和挫折——两者都起到抑制磁序的作用——相交。 我们研究了自旋-1/2链化合物 AgCuVO$_4$ 的磁序 使用穆子自旋光谱和中子衍射。 在$T_N = 2.0(1)$ K时出现长程磁序，这为$\sim$1/200 的主要链内耦合$J$以及$\sim$1/15 的链间相互作用。 共线非公度振幅调制磁结构具有0.13(2) $\mu_\mathrm{B}$的减小有序磁矩，局限于 $ab$平面，并沿 $c$轴调制——垂直于自旋链——表明存在受挫的链间耦合。 低 $T_N$、小磁矩和非公度序突出了强受挫性，使AgCuVO$_4$成为探索量子自旋链中受挫性的模型系统。 显示英文摘要

摘要： Quantum spin chains with competing interactions offer a platform where low dimensionality and frustration--both acting to suppress magnetic order--intersect. We studied magnetic ordering in the spin-1/2 chain compound AgCuVO$_4$ using muon spin spectroscopy and neutron diffraction. Long-range magnetic order emerges at $T_N = 2.0(1)$ K, which is $\sim$1/200 of the dominant intrachain coupling $J$ and $\sim$1/15 of the interchain interactions. The collinear incommensurate amplitude-modulated magnetic structure features a reduced ordered moment of 0.13(2) $\mu_\mathrm{B}$, confined to the $ab$ plane and modulated along the $c$ axis--perpendicular to the spin chains--indicating frustrated interchain couplings. The low $T_N$, small moment, and incommensurate order highlight strong frustration, positioning AgCuVO$_4$ as a model system for exploring frustration in quantum spin chains.