TbMnO 中晶体场激发与红外活性声子的研究
Study of crystal-field excitations and infrared active phonons in TbMnO.
作者信息
Mansouri S, Jandl S, Balli M, Fournier P, Mukhin A A, Ivanov V Yu, Balbashov A, Orlita M
机构信息
Département de Physique, Regroupement Québécois sur les Matériaux de Pointe et Institut Quantique, Université de Sherbrooke, Sherbrooke J1K 2R1, Canada.
出版信息
J Phys Condens Matter. 2018 May 2;30(17):175602. doi: 10.1088/1361-648X/aaaf06. Epub 2018 Feb 13.
The Tb (4f ) crystal-field (CF) excitations and the infrared phonons in TbMnO are studied as a function of temperature and under an applied magnetic field. The phonon energy shifts reflect local displacement of the oxygen ions that contribute to the CF energy level shifts below 120 K and under magnetic field. The CF polarized transmission spectra provide interesting information about the debated nature of the excitations at 41, 65, 130 cm. We also evaluate the contribution of the charge transfer mechanism to the magnetoelectric process in TbMnO under magnetic field.
研究了TbMnO中Tb（4f）晶体场（CF）激发和红外声子随温度以及在施加磁场下的变化情况。声子能量位移反映了氧离子的局部位移，这种位移在120 K以下且在磁场作用下会导致CF能级位移。CF偏振透射光谱提供了关于41、65、130 cm处激发的争议性质的有趣信息。我们还评估了电荷转移机制在磁场下对TbMnO中磁电过程的贡献。
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