Spin crossover in (Mg,Fe)O: A Mossbauer effect study with an alternative interpretation of x-ray emission spectroscopy data
Spin crossover in (Mg,Fe)O: A Mossbauer effect study with an alternative interpretation of x-ray emission spectroscopy data
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DOI：
10.1103/physrevb.73.100101
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发表时间：
2006-03-01
影响因子：
3.7
通讯作者：
McCammon, CA
中科院分区：
文献类型：
--
作者：
Kantor, IY;Dubrovinsky, LS;McCammon, CA
用高压穆斯堡尔光谱研究了（Mg0.8Fe0.2）O铁方长石中的自旋交叉。在55 GPa左右出现了一个低自旋子谱分量，但在100 GPa以上高自旋子谱完全消失之前，存在一个高自旋和低自旋状态都稳定的显著压力区。这些结果与最近的x射线发射光谱（XES）结果只有部分一致，差异可能是由于分析x射线发射光谱数据时使用的假设在高压下不完全满足。提出了一种基于谱分解的x射线数据分析替代方法，该方法与穆斯堡尔数据完全一致，并允许从x射线数据中提取附加信息。
A high-pressure Mossbauer spectroscopy study of a spin crossover in (Mg0.8Fe0.2)O ferropericlase is presented. A low-spin subspectral component appears at about 55 GPa, but there is a significant pressure region over which both high-spin and low-spin states are stable, before the high-spin component disappears completely above 100 GPa. These results are only partly consistent with recent x-ray emission spectroscopy (XES) results, and the discrepancy is likely due to assumptions used in analyzing the XES data that are not fully satisfied at high pressure. An alternative method of XES data analysis based on spectral decomposition is presented, which is fully consistent with the Mossbauer data and allows the extraction of additional information from the XES data.