Anomalous x-ray scattering measurement of near-neighbor individual pair displacements and chemical order in Fe22.5Ni77.5.
Anomalous x-ray scattering measurement of near-neighbor individual pair displacements and chemical order in Fe22.5Ni77.5.
复制标题
Fe22.5Ni77.5 中近邻单对位移和化学顺序的异常 X 射线散射测量。
作者：
Ice;Sparks;Habenschuss;Shaffer
我们展示了一个异常的X-射线衍射过程中的晶体固溶体的对相关性的测定。这个过程实验性地去除了大的热漫散射背景，没有任何假设，并允许分离化学特定的静态位移。我们恢复了Fe{sub 22.5}Ni{sub 77.5}单晶在1000 {degree}C淬火时的近邻化学序和静态位移。Fe-Fe最近邻距离从平均晶格膨胀了0.043 A。这种膨胀的可能的磁起源进行了讨论。
We demonstrate an anomalous x-ray-diffraction procedure for the determination of pair correlations in crystalline solid solutions. This procedure experimentally removes the large thermal diffuse scattering background with no assumptions and permits separation of chemically specific static displacements. We recover the near-neighbor chemical order and static displacements in a Fe{sub 22.5}Ni{sub 77.5} single crystal quenched from 1000 {degree}C. The Fe-Fe nearest-neighbor distance is dilated by {similar to}0.043 A from the average lattice. The possible magnetic origins of this dilation are discussed.