Raman- and infrared-active phonons in hexagonal YMnO3: Experiment and lattice-dynamical calculations

被引：196

作者：

Iliev, MN

Lee, HG

Popov, VN

Abrashev, MV

Hamed, A

Meng, RL

Chu, CW

机构：

[1] UNIV PARIS 06,PHYS SOLIDES LAB,F-75252 PARIS,FRANCE

[2] TECH UNIV BERLIN,INST FESTKORPERPHYS,D-10623 BERLIN,GERMANY

[3] UNIV SOFIA,FAC PHYS,BG-1126 SOFIA,BULGARIA

来源：

PHYSICAL REVIEW B | 1997年 / 56卷 / 05期

关键词：

D O I：

10.1103/PhysRevB.56.2488

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Raman-scattering and far-infrared-transmission spectra of hexagonal YMnO3 (space group P6(3)cm) are reported and discussed. Ln the Raman spectra measured in several exact scattering configurations, lines of A(1) (at 148, 190, 257, similar to 300, 433, 459, and 681 cm(-1)), E-1 (at 376, 408, and 632 cm(-1)), and E-2 (at 135, and similar to 215 cm(-1)), symmetries have been observed. Maxima in the infrared absorption have been found at 211, 238, 265, 281, 308, 398, 428, 457, 491, 596, and 612 cm(-1). An assignment of the phonon lines to definite atomic vibrations has been made on the basis of their symmetries in close comparison with results of lattice-dynamical calculations for YMnO3 in its ferroelectric (P6(3)cm, Z=6) and high-temperature paraelectric (P6(3)/mmc, Z=2) phases.

引用

页码：2488 / 2494

页数：7

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