Pressure-induced magnetization in FeO: evidence from elasticity and Mössbauer spectroscopy.
Pressure-induced magnetization in FeO: evidence from elasticity and Mössbauer spectroscopy.
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Fe3O 中的压力感应磁化：来自弹性和穆斯堡尔光谱的证据
DOI：
10.1103/physrevlett.93.215502
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发表时间：
2004
影响因子：
8.6
通讯作者：
Reichmann
中科院分区：
文献类型：
--
作者：
Kantor;Jacobsen;Kantor;Dubrovinsky; McCammon;Reichmann
在金刚石压砧装置中，用GHz频率的声干涉测量法测定了方铁矿的全弹性张量为10 GPa。在实验压力范围内，FeO的软模弹性常数减小了20%.一个不寻常的不连续性的压力导数的和数据对应的压力下，磁有序转变的开始观察到高压穆斯堡尔谱和中子粉末衍射。我们的新结果结合文献结构的高数据表明，有一个磁性的，虽然仍然立方，相之间的FeO。
The complete elastic tensor of(wüstite) has been determined to 10 GPa using acoustic interferometry at GHz frequencies inside a diamond-anvil cell. The soft mode () elastic constant of FeO is reduced by 20% over the experimental pressure range. An unusual discontinuity in the pressure derivatives ofandatcorresponds to the pressure at which the onset of a magnetic ordering transition is observed by high-pressure Mössbauer spectroscopy and neutron powder diffraction. Our new results combined with literature structural highdata suggest that there is a magnetic, although still cubic, phase of FeO betweenand.