论文标题
二维旋转玻璃中的本地核和磁性，Mn $ _ {0.5} $ fe $ _ {0.5} $ PS $ _3 $
Local nuclear and magnetic order in the two-dimensional spin glass, Mn$_{0.5}$Fe$_{0.5}$PS$_3$
论文作者
论文摘要
我们对二维旋转玻璃中短距离核和磁性顺序的全面研究，Mn $ _ {0.5} $ fe $ _ {0.5} $ ps $ _3 $。核中子中子散射数据揭示了Mn $^{2+} $和Fe $^{2+} $离子在蜂窝层中的随机分布，这通过诱导邻近的交换相互作用之间的竞争，从而产生旋转玻璃状态，在磁性易感性数据之间通过磁敏感性数据在玻璃过渡时通过cusp和玻璃过渡，$ t_g = 35 $ k.分析磁性差异= 35 $ k。样品可以进一步了解自旋玻璃相的起源，自旋相关性揭示了蜂窝平面内磁矩之间满足和不满意的相关性的混合物，可以通过考虑父级化合物的磁性结构，MNPS $ _3 $和FEPS $ _3 $来解释这一点。我们发现，在从上方接近$ t_g $时，合奏平均的相关长度$ξ= 5.5（6）$Å在满意的相关性之间发展，低于$ t_g $，玻璃行为引起了不舒适的时刻之间与距离无关的相关性。发现平面之间的相关性非常弱，这反映了我们对单晶衍射测量中与c*轴平行的类似杆状结构的观察结果，这证实了Mn $ _ {0.5} $ fe $ _ {0.5} $ _ {0.5} $ _ {0.5} $ ps $ ps $ _3 $的二维性质。
We present a comprehensive study of the short-ranged nuclear and magnetic order in the two-dimensional spin glass, Mn$_{0.5}$Fe$_{0.5}$PS$_3$. Nuclear neutron scattering data reveal a random distribution of Mn$^{2+}$ and Fe$^{2+}$ ions within the honeycomb layers, which gives rise to a spin glass state through inducing competition between neighbouring exchange interactions, indicated in magnetic susceptibility data by a cusp at the glass transition, $T_g = 35$ K. Analysis of magnetic diffuse neutron scattering data collected for both single crystal and polycrystalline samples gives further insight into the origin of the spin glass phase, with spin correlations revealing a mixture of satisfied and unsatisfied correlations between magnetic moments within the honeycomb planes, which can be explained by considering the magnetic structures of the parent compounds, MnPS$_3$ and FePS$_3$. We found that, on approaching $T_g$ from above, an ensemble-averaged correlation length of $ξ= 5.5(6)$ Å developed between satisfied correlations, and below $T_g$, the glassy behaviour gave rise to a distance-independent correlation between unsatisfied moments. Correlations between the planes were found to be very weak, which mirrored our observations of rod-like structures parallel to the c* axis in our single crystal diffraction measurements, confirming the two-dimensional nature of Mn$_{0.5}$Fe$_{0.5}$PS$_3$.
