A lattice dynamical investigation of the Raman and the infrared frequencies of the cubic A2Hf2O7 pyrochlores

被引：33

作者：

Gupta, HC

Brown, S

Rani, N

Gohel, VB

机构：

[1] Indian Inst Technol, Dept Phys, New Delhi 110016, India

[2] Gujarat Univ, Dept Phys, Ahmadabad 380009, Gujarat, India

[3] Maitreyi Coll, Dept Phys, New Delhi 110021, India

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2002年 / 63卷 / 03期

关键词：

phonons;

D O I：

10.1016/S0022-3697(01)00151-2

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A short range force constant model has been applied for the first time to investigate the Raman and the infrared frequencies in A(2)Hf(2)O(7) (A = La, Nd, Sm, Eu) pyrochlores in their cubic phase of space group Fd (3) over barm. The calculations of zone center phonons have been made with five stretching and two bending force constants. The calculated values of Raman and infrared frequencies are in good agreement with the observed ones. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：535 / 538

页数：4

共 6 条

[1]

GUNDOBIN NV, 1975, ZH NEORG KHIM+, V20, P582

[2]

Gupta HC, 2001, J RAMAN SPECTROSC, V32, P41, DOI 10.1002/1097-4555(200101)32:1<41::AID-JRS664>3.0.CO

[3]

2-R

[4] INFRARED-ABSORPTION CHARACTERISTICS OF PYROCHLORE STRUCTURE [J].