Phonon Density of States and Elastic Properties of Fe-based Materials under Compression

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• 作者：Viktor V. Struzhkin ; Ho-kwang Mao ; Wendy L. Mao ; Russell J. Hemley ; Wolfgang Sturhahn ; Ercan E. Alp ; Catherine L'Abbe ; Michael Y. Hu and Daniel Errandonea
• 关键词：high pressure ; phonon ; DOS ; inelastic ; nuclear ; scattering ; antiferromagnetism
• 刊名：Hyperfine Interactions
• 出版年：2004
• 出版时间：2004
• 年：2004
• 卷：153
• 期：1/4
• 页码：3-15
• 全文大小：203 KB

文摘

The elastic properties of compressed Fe and FeO are examined using density of states measured by nuclear resonant inelastic X-ray scattering. We analyze the data both from non-hydrostatic and nearly hydrostatic experiments. The effects of preferred orientation in non-hydrostatic experiments could be substantial. We present also evidence in favor of strong softening of the Debye sound velocity due to the magnetoelastic coupling in iron oxide near the Nèel transition. The geophysical implications resulting from the elastic and magnetoelastic properties of these and related materials under compression are discussed.