Far-Infrared Absorption in Ultrafine Al Particles
- 16 May 1977
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 38 (20) , 1161-1163
- https://doi.org/10.1103/physrevlett.38.1161
Abstract
It is shown that the strong far-infrared absorption in small Al particles, recently observed by Granqvist et al., may be explained as arising from the dielectric losses in the amorphous oxide layers covering the particles. Aggregation of particles into clusters is found essential in order to produce the observed dependence of absorptivity on particle size. The propsed mechanism provides a simple understanding of the absence of any superconducting ordering effects in the absorption.Keywords
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