Phonon dynamics of hexagonal Y Mn_{1?span style='font-style: italic'>x}Fe_xO₃

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• 作者：M. Zaghrioui  ; ;   ; ^a ;   ; ^{zaghrioui@univ-tours.fr} ; V. Ta Phuoc^a
• 关键词：A. Multiferroics ; D. Phonon properties ; E. Optical spectroscopies
• 刊名：Solid State Communications
• 出版年：2011
• 出版时间：November 2011
• 年：2011
• 卷：151
• 期：22
• 页码：1704-1707
• 全文大小：679 K

文摘

Phonon dynamics was investigated on Y Mn_1?i>xFe_xO₃() hexagonal manganite polycrystals. Phonon modes were properly assigned using results obtained on Y MnO₃ single crystal, by mixing the plane and the axis optical responses. Upon increasing the Fe content, most of the phonon mode frequencies do not vary drastically. However, some modes involving Y and O atom displacements along the axis are affected by doping. Indeed, a redshift of their transverse optical frequency was interpreted as an elongation of Y¨CO distance along the -axis, resulting in a change in yttrium coordination.