论文标题
形成短距离磁性顺序和避免加压型牛肉中的铁磁量子临界点$ _3 $
Formation of short-range magnetic order and avoided ferromagnetic quantum criticality in pressurized LaCrGe$_3$
论文作者
论文摘要
lacrge $ _3 $作为避免迭代磁铁中避免铁磁（FM）量子关键的范式引起了人们的关注。通过结合热力学，传输，X射线和中子散射以及$μ$ SR的测量，我们完善了LACRGE $ _3 $的温度压力相图。我们为FM转变的一阶特征提供热力学证据（i），当它被抑制至低温时，以及（ii）在高压下形成新阶段时。从我们的显微镜数据中，我们推断出这些高压阶段中存在短距离FM有序簇。这些结果表明，Lacrge $ _3 $是一个罕见的例子，它填补了避免使用清洁和强烈混乱的金属中避免FM量子关键的两个极限之间的空白。
LaCrGe$_3$ has attracted attention as a paradigm example of the avoidance of ferromagnetic (FM) quantum criticality in an itinerant magnet. By combining thermodynamic, transport, x-ray and neutron scattering as well as $μ$SR measurements, we refined the temperature-pressure phase diagram of LaCrGe$_3$. We provide thermodynamic evidence (i) for the first-order character of the FM transition when it is suppressed to low temperatures and (ii) for the formation of new phases at high pressures. From our microscopic data, we infer that short-range FM ordered clusters exist in these high-pressure phases. These results suggest that LaCrGe$_3$ is a rare example, which fills the gap between the two extreme limits of avoided FM quantum criticality in clean and strongly disordered metals.
