OPTICAL AND MAGNETO-OPTICAL MEASUREMENTS ON MAGNETIC RARE EARTH-COBALT ALLOY FILMS

Abstract

The results of an investigation of the Kerr magneto-optic effect and the complex refractive index for pure cobalt and for four ferromagnetic rare earth-cobalt alloys of the composition RCo5 are reported. Magnetic data of all films are also given. The thin film samples were prepared by vapor deposition in ultrahigh vacuum and measured in situ. The effect of annealing and atmospheric corrosion on the optical and magneto-optical properties was investigated. The index of refraction, n, was found to decrease considerably after short exposure to air, while the Kerr effect increased. The rare earth alloys show an optical and magneto-optical behavior similar to that of cobalt. Dispersion curves of n, k, theta sub M, epsilon sub M, Q sub o, and q for wave- lengths of 400 to 616 millimicron are presented.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1966
Accession Number
AD0632608

Entities

People

  • Axel M. Stoffel
  • Karl J. Strnat

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Alloys
  • Atmospheric Corrosion
  • Cobalt Alloys
  • Films
  • Heat Treatment
  • Kerr Effects
  • Kerr Magneto-Optic Effect
  • Magnetic Properties
  • Magneto-Optic Effects
  • Materials
  • Materials Laboratories
  • Measurement
  • Optical Properties
  • Rare Earth Alloys
  • Refraction
  • Refractive Index
  • Thin Films

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Spectroscopy.