PHASE TRANSITION INDUCED INFRA-RED ACTIVITY OF ZONE BOUNDARY PHONONS IN KMNF3

被引：5

作者：

BALTES, HP

KNEUBUHL, FK

机构：

[1] Laboratorium für Festkörperphysik der ETH, Zürich

来源：

PHYSICS LETTERS A | 1969年 / A 30卷 / 02期

关键词：

D O I：

10.1016/0375-9601(69)91158-X

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The 184°K phase transition in KMnF3 is studied on the basis of a model involving a volume decrease of the first Brillouin zone. One- and two-phonon processes may become infrared active below the transition temperature by virtue of additional zone center phonons. The model is supported by new evidence from the temperature dependent infrared reflection spectrum. © 1969.

引用

页码：98 / &

共 7 条

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[7] STRUCTURAL PHASE TRANSITIONS IN PEROVSKITE-TYPE CRYSTALS
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MULLER, KA
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