Spin crossover in (Mg,Fe)O: A Mossbauer effect study with an alternative interpretation of x-ray emission spectroscopy data

被引：58
|
作者：
Kantor, IY [1 ]
Dubrovinsky, LS [1 ]
McCammon, CA [1 ]
机构：
[1] Univ Bayreuth, Bayer Geoinst, D-95440 Bayreuth, Germany
来源：
PHYSICAL REVIEW B | 2006年 / 73卷 / 10期
关键词：
D O I：
10.1103/PhysRevB.73.100101
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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.
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页数：4
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