Recently, Yb-based triangular-lattice antiferromagnets have garnered significant interest as possible quantum spin-liquid candidates. One example is YbMgGaO₄, which showed many promising spin-liquid features, but also possesses a high degree of disorder owing to site-mixing between the non-magnetic cations. To further elucidate the role of chemical disorder and to explore the phase diagram of these materials in applied field, we present neutron scattering and sensitive magnetometry measurements of the closely related compound, YbZnGaO₄. Our results suggest a difference in magnetic anisotropy between the two compounds, and we use key observations of the magnetic phase crossover to motivate an exploration of the field- and exchange parameter-dependent phase diagram, providing an expanded view of the available magnetic states in applied field. This enriched map of the phase space serves as a basis to restrict the values of parameters describing the magnetic Hamiltonian with broad application to recently discovered related materials.

最近，基于 Yb 的三角晶格反铁磁体作为可能的量子自旋液体候选物引起了人们的极大兴趣。一个例子是 YbMgGaO ₄，它显示了许多有希望的自旋液体特征，但由于非磁性阳离子之间的位点混合，它也具有高度的无序性。为了进一步阐明化学无序的作用并探索这些材料在应用场中的相图，我们提出了密切相关的化合物 YbZnGaO _{4 的}中子散射和灵敏的磁力测量. 我们的结果表明两种化合物之间的磁各向异性存在差异，我们使用磁相交叉的关键观察来激发对场和交换参数相关相图的探索，提供应用中可用磁态的扩展视图场地。这个丰富的相空间图作为限制描述磁性哈密顿量的参数值的基础，广泛应用于最近发现的相关材料。