THEORETICAL-STUDY OF DYNAMICAL PROPERTIES OF BINARY METALLIC GLASSES IN THE HARMONIC APPROXIMATION

被引：3

作者：

SATO, H ^{[1
]}

TANIMORI, S ^{[1
]}

ISHIDA, A ^{[1
]}

ITOH, M ^{[1
]}

机构：

[1] SHIMANE UNIV, DEPT PHYS, MATSUE, SHIMANE 690, JAPAN

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1994年 / 181卷 / pt 2期

关键词：

D O I：

10.1016/0921-5093(94)90797-8

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A theory is developed to calculate the vibrational frequency spectrum of binary amorphous solids in the harmonic approximation. It is shown that the spectrum of isotropically disordered material can be separated into longitudinal acoustic (LA), transverse acoustic (TA), longitudinal optical (LO) and transverse optical (TO) phonons in a strict sense. Calculations are performed both analytically and numerically for each mode of Mg70Zn30 metallic glass. It is clarified that the roton-like dispersion curve of the longitudinal vibrations, determined by an inelastic neutron-scattering experiment, is well described as consisting of LA and LO phonons.

引用

页码：1043 / 1046

页数：4

共 10 条

[1] PHONON-DISPERSION IN METALLIC GLASSES - A SIMPLE-MODEL [J].