脉冲磁场作用下铈合金中的一种强而无序的体积膨胀相
A robust but disordered collapsed-volume phase in a cerium alloy under the application of pulsed magnetic fields
摘要：
我们报告的同步辐射X射线粉末衍射测量Ce0.8La0.1Th0.1脉冲磁场高达28特斯拉。已知该合金在环境压力下冷却时表现出连续的体积塌陷，这是元素铈中的γ-> α转变的改变。最近，有人建议的基础上，场冷却电阻率和脉冲场磁化测量，在这种合金中的体积塌陷可以通过施加磁场抑制。相反，我们的直接衍射测量显示了一个强大的崩溃阶段，它持续在磁场高达28特斯拉。我们还观察到纳米级的无序在塌陷阶段，这越来越多地污染热循环的高温相。
英文摘要：
We report synchrotron x-ray powder diffraction measurements of Ce0.8La0.1Th0.1 subject to pulsed magnetic fields as high as 28 Tesla. This alloy is known to exhibit a continuous volume collapse on cooling at ambient pressure, which is a modification of the gamma -> alpha transition in elemental cerium. Recently, it has been suggested on the basis of field-cooled resistivity and pulsed field magnetization measurements that the volume collapse in this alloy can be suppressed by the application of magnetic fields. Conversely, our direct diffraction measurements show a robust collapsed phase, which persists in magnetic fields as high as 28 Tesla. We also observe nanoscale disorder in the collapsed phase, which increasingly contaminates the high temperature phase on thermal cycling.
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