RAMAN-ACTIVE AND INFRARED-ACTIVE PHONONS IN YBACUFEO5 - EXPERIMENT AND LATTICE-DYNAMICS

被引：61

作者：

ATANASSOVA, YK ^{[1
]}

POPOV, VN ^{[1
]}

BOGACHEV, GG ^{[1
]}

ILIEV, MN ^{[1
]}

MITROS, C ^{[1
]}

PSYCHARIS, V ^{[1
]}

PISSAS, M ^{[1
]}

机构：

[1] NATL CTR SCI RES DEMOCRITOS, INST MAT SCI, GR-15310 ATHENS, GREECE

来源：

PHYSICAL REVIEW B | 1993年 / 47卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.47.15201

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The results of polarized Raman scattering, far-infrared (FIR) absorption, Kramers-Kronig analysis of FIR reflectance, and lattice-dynamical calculations of the perovskitelike compound YBaCuFeO5 (space group P4mm) are reported. All 16 Raman- and infrared-active GAMMA-point phonons (6A1 + 2B1 + 8E) have been identified and assigned to definite atomic vibrations in close comparison with the structurally similar tetragonal YBa2Cu3O6 system. The appearance of an additional strong Raman line at 576 cm-1 is discussed in terms of disorder-induced Raman scattering. The normal-mode frequencies are in reasonable agreement with the results of lattice-dynamical calculations in the framework of a shell model with parameters extracted from several metallic oxides and perovskite compounds.

引用

页码：15201 / 15207

页数：7

共 26 条

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