Raman spectroscopy of CaRuO3
Raman spectroscopy of CaRuO3
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CaRuO3 的拉曼光谱
DOI：
10.1103/physrevb.66.014101
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发表时间：
2002
影响因子：
3.7
通讯作者：
M. Iliev
中科院分区：
文献类型：
--
作者：
N. Kolev;Chonglin Chen;M. Gospodinov;R. Bontchev;V. Popov;A. Litvinchuk;M. Abrashev;V. Hadjiev;M. Iliev
我们报道了CaRuO 3（Ru 4 +）非孪生单晶的偏振拉曼光谱，揭示了该化合物中的声子激发。观察到的拉曼线被分配到明确的原子振动的基础上的晶格动力学计算的预测和通过比较的光谱的同构SrRuO 3。与铁磁SrRuO3和反铁磁Ca3Ru2O7等Ru 4 +化合物不同，拉曼光谱的温度依赖性没有表现出与磁有序有关的异常。这一结果有利于顺磁性或短程自旋玻璃型磁相互作用的CaRuO3。
We report on the polarized Raman spectra of untwinned single crystals of CaRuO 3 (Ru 4 + ) that reveal the phonon excitations in this compound. The observed Raman lines are assigned to definite atomic vibrations based on predictions of lattice dynamics calculations and by a comparison to the spectra of isostructural SrRuO 3 . Unlike some other Ru 4 + compounds such as ferromagnetic SrRuO 3 and antiferromagnetic Ca 3 Ru 2 O 7 , the temperature dependence of the Raman spectra shows no anomalies related to magnetic ordering. This result is in favor of paramagnetic or short-range spin-glass-type magnetic interactions in CaRuO 3 .