Study of optical and magneto-optical properties of CoFe-HfO2 granular magnetic films

V. G. Kravets*, A. K. Petford-Long, A. F. Kravetz

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Granular films of composition (CoFe)x(HfO2)1-x with continuous variation of the Co0.5Fe0.5 volume fraction in the range 0.1<x<0.9 have been prepared by e-beam co-evaporation. The optical properties of the thin granular composite films have been determined from transmission and reflection spectra in the 300-1100 nm region. The optical characteristics of the granular films as a function of x were also determined by the ellipsometrical method at λ = 632.8 nm. We find that the transmission and reflection spectra and the dielectrical function have anomalies near the percolation threshold at xp≈0.45. The Faraday rotation in the films was determined at λ = 632.8 nm. The spectral dispersion of Faraday effects have peak in the region of the plasmon frequency. The Faraday effect is greatly enhanced near xp. The calculated optical and magneto-optical parameters, described in the framework of the effective medium approximation, are in qualitative agreement with experimental data.

Original languageEnglish (US)
Pages (from-to)292-299
Number of pages8
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume4
Issue number4
DOIs
StatePublished - Oct 1999

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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