A new ultra-violet magneto-optical spectroscopic instrument and its application to Co-based multilayers and thin films

Author

Van Drent, W.P. ; Suzuki, Takao

Author_Institution

Inf. & Storage Mater. Lab., Toyota Technol. Inst., Nagoya, Japan

Volume

33

Issue

5

fYear

1997

fDate

9/1/1997 12:00:00 AM

Firstpage

3223

Lastpage

3225

Abstract

A magneto-optic measurement system for the 1.4-6.8 eV photon energy range (λ=182-886 nm) is realized. A new technique to calibrate the applied modulator in-situ, essential for accurate measurements over such a wide range of photon energies, is demonstrated. Measurements at Co/Pt multilayers with 3 Å Co layers and various Pt layer thicknesses indicate a peak for the polar Kerr rotation (~-0.5°) at about 5.1 eV, which is not present in CoPt₃ alloy film. This feature may be partly due to quantum well effects, but there is also a possibility for an optical interference effect. Furthermore, positive Kerr rotations up to about +0.4° were found at photon energies above 5.7 eV

Keywords

Kerr magneto-optical effect; cobalt; cobalt alloys; ferromagnetic materials; magnetic multilayers; magnetic thin films; metallic thin films; modulation spectroscopy; platinum; platinum alloys; ultraviolet spectra; ultraviolet spectrometers; 1.4 to 6.8 eV; 182 to 886 nm; 3 A; Co-Pt; Co-based multilayers; Co/Pt multilayers; CoPt₃; CoPt₃ alloy film; accurate measurements; applied modulator calibration; optical interference effect; photon energy range; polar Kerr rotation; positive Kerr rotations; quantum well effects; thin films; ultra-violet magneto-optical spectroscopic instrument; Cobalt alloys; Energy measurement; Instruments; Magnetic multilayers; Magnetooptic effects; Optical films; Optical modulation; Rotation measurement; Spectroscopy; Thickness measurement;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.617898

Filename

617898