Optical and magneto-optical properties of NixSiO2(1-x) granular films

Citation
Rj. Zhang et al., Optical and magneto-optical properties of NixSiO2(1-x) granular films, J INF M W, 20(1), 2001, pp. 57-60
Citations number
8
Language
CHINESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF INFRARED AND MILLIMETER WAVES
ISSN journal
1001-9014 → ACNP
Volume
20
Issue
1
Year of publication
2001
Pages
57 - 60
Database
ISI
SICI code
1001-9014(200102)20:1<57:OAMPON>2.0.ZU;2-G
Abstract
A series of NixSiO2(1-x) granular films were made by a magnetron rf sputter ing system with variation of x and the annealing process. Both the complex dielectric function and magneto-optical polar Kerr spectra of the samples w ere measured at room temperature in the 1.5 similar to4.5eV photon energy r ange, respectively. It was found that there are new spectral features in th e dielectric functions. The epsilon (1) spectra change continuously from po sitive to negative at the low photon energy range in these metal-insulator granular films by adjusing the composition or by the annealing process. For the NixSiO2(1-x) samples, there are broad peaks in the Kerr rotation and e llipticity spectra. The Kerr intensities increase with increasing Ni compos ition. Both the off-diagonal terms;of the dielectric terms tensor and optic al constants play important role in the enhancement of the Kerr effect in a particular spectral range for the metal-insulator granular films.