论文标题
iLmenite cotio $ _3 $中的晶格动力学和自发磁性电效效应
Lattice dynamics and spontaneous magnetodielectric effect in ilmenite CoTiO$_3$
论文作者
论文摘要
伊尔米特型晶体由于其吸引人的物理特性而找到了各种技术应用。我们介绍了蜂窝抗磁性iLmenite cotio $ _3 $单晶的晶格动力学研究的结果，该互补极化红外，拉曼和介电光谱技术补充了DFT计算。所有预测的红外和拉曼活性声子的频率和对称性都被唯一地识别出来。此外，发现介电介电常数显示出由于自发的磁性磁效应而在零磁场中的抗铁磁有序温度下的明显变化。我们的结果建立了可靠的基础，以进一步研究声子与这种有前途材料的旋转，磁激发和其他物理现象的偶联。
Ilmenite-type crystals find a variety of technological applications due to their intriguing physical properties. We present the results of the lattice dynamics studies of honeycomb antiferromagnetic ilmenite CoTiO$_3$ single crystal by the complementary polarized infrared, Raman, and dielectric spectroscopic techniques that are supplemented by the DFT calculations. The frequencies and symmetries of all predicted infrared and Raman active phonons were uniquely identified. Furthermore, it was found that the dielectric permittivity demonstrates distinct changes below antiferromagnetic ordering temperature in zero magnetic field due to spontaneous magnetodielectric effect. Our results establish the reliable basis for further investigation of the coupling of phonons with spins, magnetic excitations and other physical phenomena of this promising material.
