论文标题
USB中磁结构过渡的价不稳定$ _2 $
Valence instability across magnetostructural transition in USb$_2$
论文作者
论文摘要
我们已经对USB $ _2 $进行了依赖压力的X射线衍射和共振X射线发射光谱实验，以进一步表征在8 GPA附近发生的AFM-FM过渡。我们发现，磁过渡与四方到骨的过渡一致，导致体积崩溃以及瞬态$ \ textit {f} $ - 职业增强。与UAS $ _2 $和UASS相比，USB $ _2 $显示出减少的批量模量和过渡压力，并且在结构过渡时的体积崩溃增加。除了整个过渡区域的增强外，$ \ textit {f} $ - 占用率从1.96稳定下降到1.75。
We have performed pressure dependent X-ray diffraction and resonant X-ray emission spectroscopy experiments on USb$_2$ to further characterize the AFM-FM transition occurring near 8 GPa. We have found the magnetic transition coincides with a tetragonal to orthorhombic transition resulting in a 17% volume collapse as well as a transient $\textit{f}$-occupation enhancement. Compared to UAs$_2$ and UAsS, USb$_2$ shows a reduced bulk modulus and transition pressure and an increased volume collapse at the structural transition. Except for an enhancement across the transition region, the $\textit{f}$-occupancy decreases steadily from 1.96 to 1.75.
