论文标题
沮丧的抗fiferromagnet GD2TI2O7中部分磁顺序的性质
Nature of Partial Magnetic Order in the Frustrated Antiferromagnet Gd2Ti2O7
论文作者
论文摘要
部分排序的磁体与自旋液体和常规有序磁体都不同，因为在同一磁相中并存的秩序和无序。在这里，我们在规范沮丧的pyrochlore antiferromagnet gd $ _2 $ ti $ _ {2} $ o $ $ _ {7} $中确定部分顺序的性质。在应用磁场，磁对称分析，非弹性中子散射测量和自旋波建模中，使用单晶中子 - 划分测量值，我们表明其低温磁性结构涉及两个繁殖矢量（2- $ \ $ \ $ \ MATHBF {K {K} $结构），并具有抑制的有序磁性的磁性磁性磁力并增强的旋转旋转旋转和增强的旋转波效率。我们的实验结果支持GD $ _ {2} $ ti $ _ {2} $ o $ $ _ {7} $中热波动驱动的顺序的理论预测。
Partially-ordered magnets are distinct from both spin liquids and conventional ordered magnets because order and disorder coexist in the same magnetic phase. Here, we determine the nature of partial order in the canonical frustrated pyrochlore antiferromagnet Gd$_2$Ti$_{2}$O$_{7}$. Using single-crystal neutron-diffraction measurements in applied magnetic field, magnetic symmetry analysis, inelastic neutron-scattering measurements, and spin-wave modeling, we show that its low-temperature magnetic structure involves two propagation vectors (2-$\mathbf{k}$ structure) with suppressed ordered magnetic moments and enhanced spin-wave fluctuations. Our experimental results support theoretical predictions of thermal fluctuation-driven order in Gd$_{2}$Ti$_{2}$O$_{7}$.
