OPTICAL PHONONS IN R2BAMO5 OXIDES WITH M = CO, NI, CU, AND R = A RARE-EARTH

被引：31

作者：

DEANDRES, A ^{[1
]}

TABOADA, S ^{[1
]}

MARTINEZ, JL ^{[1
]}

SALINAS, A ^{[1
]}

HERNANDEZ, J ^{[1
]}

SAEZPUCHE, R ^{[1
]}

机构：

[1] UNIV COMPLUTENSE MADRID,FAC CIENCIAS QUIM,DEPT QUIM INORGAN,E-28040 MADRID,SPAIN

来源：

PHYSICAL REVIEW B | 1993年 / 47卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.47.14898

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Compounds with the formula R2BaMO5 where R=rare earth and M =Co, Ni, or Cu, have been studied with Raman spectroscopy. The lattice dynamics of the three different crystallographic phases adopted by these systems (space groups Immm, Pnma, and P4/mbm) is discussed in relation to the transition-metal-oxygen coordination, and to the binding M-O and R-O distances. An almost complete identification of the normal modes has been performed for the compounds with the P4/mbm structure and an estimation of the parameters of the M-O and R-O stretching force constants has been obtained for the Immm and P4/mbm structures.

引用

页码：14898 / 14904

页数：7

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