ErMnO3中自旋波的磁激活转变
Magneto- to electro-active transmutation of spin waves in ErMnO3
摘要：
利用同步辐射中子非弹性散射、太赫兹和远红外光谱研究了多铁性六方钙钛矿ErMnO_3的低能动力学性质。从这些互补的技术，我们已经确定了磁振子和晶体场谱，并确定了一个区域中心磁振子只激发的电场的电磁波。通过与同结构YMnO3化合物和晶场计算的比较，我们提出这种动态磁电过程是由于磁振子与电活性晶场跃迁的杂交。
英文摘要：
The low energy dynamical properties of the multiferroic hexagonal perovskite ErMnO3 have been studied by inelastic neutron scattering as well as terahertz and far infrared spectroscopies on synchrotron source. From these complementary techniques, we have determined the magnon and crystal field spectra and identified a zone center magnon only excitable by the electric field of an electromagnetic wave. Using comparison with the isostructural YMnO3 compound and crystal field calculations, we propose that this dynamical magnetoelectric process is due to the hybridization of a magnon with an electro-active crystal field transition.
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