STRUCTURAL EXCITATIONS AND PHASE-TRANSFORMATION

被引：6

作者：

DORNER, B

机构：

[1] Institut Max von Laue-Paul Langevin, 38042 Grenoble Cedex

来源：

PHYSICA B | 1992年 / 180卷

关键词：

D O I：

10.1016/0921-4526(92)90729-C

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Only a few topics have been chosen to show the state of the art in inelastic neutron scattering concerned with structural excitations and phase transformations. Experimental and theoretical work on phonon dispersion curves in quartz and sapphire are presented and an eigenvector determination in Si. Longitudinal acoustic excitations along the biological molecule DNA have been observed. A remark on line shapes due to anharmonicity is followed by results on vanishing damping in the superconducting state of Nb. A series of phase transformations in La2-xBaxCuO4 can be analyzed by molecular field theory. Corresponding soft modes can be identified in the structurally similar but insulating compound Pr2NiO4. Martensitic phase transformations have been studied in the shape memory material Ni62.5Al37.5 and in Ti. Zr and Hf, where the transition goes from BCC to HCP.

引用

页码：265 / 270

页数：6

共 14 条

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[8] LATTICE INSTABILITY AND LOW-TEMPERATURE PHASE-TRANSITION IN PR2NIO4 [J].

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[10] LATTICE DYNAMIC STUDIES OF HTSC MATERIALS [J].

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