Measurement of elastic properties of hard films using Brillouin scattering
Date
1997
Authors
Pang, Wenjun
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Brillouin scattering of light is used to study the various surface acoustic
modes that are predicted theoretically to be supported by TiN thin films
on high speed steel (HSS). Information is thereby obtained on the elastic
properties and adhesion of the films, which range in thickness from 20nm to
4180nm. A Green's function method, invoking the surface ripple mechanism
for the inelastic scattering of light, is used to calculate the Brillouin spectrum
for scattering from the surface acoustic excitations. For the TiN/HSS
combination, guided modes take the form of true SAW, highly damped p-
SAW, "pre-Rayleigh" and "quasi-Rayleigh" and its higher order modes as
the film thickness increases. (Abbreviation abstract)
Description
A thesis submitted to the Faculty of Science
University of the Witwatersrand, Johannesburg;
in fulfilment of the requirements for the degree of
Doctor of Philosophy
Keywords
Brillouin scattering., Ions -- Scattering., Light -- Scattering., Electromagnetic waves -- Scattering.