Kagome lattice magnets are an interesting class of materials as they can host topological properties in their magnetic and electronic structures. YMn₆Sn₆ is one such compound in which various exotic magnetic and electronic topological properties have been realized. Here, by means of a partial substitution of Sn with an isovalent and slightly smaller atom Ge, we demonstrate the sensitivity of such chemical substitution on the magnetic structure and its influence in the electronic properties. Magnetic structure of YMn₆Sn₄Ge₂ determined by neutron diffraction reveals an incommensurate staggered magnetic spiral with a slightly larger spiral pitch than in YMn₆Sn₆. This change in magnetic structure influences the Fermi surface enhancing the out-of-plane conductivity. Such a sensitivity to the partial chemical substitution provides a great potential for engineering the magnetic phases and associated electronic properties not only in YMn₆Sn₆, but also in the large family of 166 rare-earth kagome magnet.

Kagome 晶格磁体是一类有趣的材料，因为它们的磁性和电子结构具有拓扑特性。YMn ₆ Sn ₆就是这样一种化合物，其中已经实现了各种奇异的磁和电子拓扑性质。在这里，通过用等价且稍小的原子Ge部分取代Sn，我们证明了这种化学取代对磁结构的敏感性及其对电子性能的影响。_{通过中子衍射测定的YMn 6} Sn ₄ Ge ₂的磁结构揭示了不相称的交错磁螺旋，其螺距比YMn ₆ Sn ₆稍大。磁结构的这种变化会影响费米表面，从而增强面外电导率。这种对部分化学取代的敏感性不仅在 YMn ₆ Sn ₆中，而且在 166 稀土 kagome 磁体大家族中，为设计磁相和相关电子特性提供了巨大的潜力。