Optical and magneto-optical characterization of evaporated Co/Pt alloys and multilayers

Author

Brandle, H. ; Weller, D. ; Scott, J.C. ; Parkin, S.S.P. ; Lin, C.J.

Author_Institution

BALZERS AG, Liechtenstein

Volume

28

Issue

5

fYear

1992

fDate

9/1/1992 12:00:00 AM

Firstpage

2967

Lastpage

2969

Abstract

The optical and magneto-optical properties of evaporated Co_1-xPt_x alloys and Co/Pt multilayers have been studied at room temperature in the photon energy range 0.8⩽hω⩽5 eV. A maximum, Pt-induced Kerr rotation of |θ_K|=0.66° is found in evaporated alloys (x ≈ 0.5) compared to |θ_K|=0.49° in corresponding multilayers. The difference is related to the type of Pt exchange polarization mechanism, which is 3-D in alloys and 2-D in multilayers, and a lower room-temperature magnetization due to a reduced Curie temperature in the multilayers. It is confirmed that a strong interband transition at 4.2 eV due to Pt contributions is responsible for the remarkable Kerr effect in Co_1-xPt_x

Keywords

Kerr magneto-optical effect; cobalt; cobalt alloys; ferromagnetic properties of substances; infrared spectra of inorganic solids; magnetic multilayers; magnetic thin films; platinum; platinum alloys; reflectivity; vacuum deposited coatings; 0.8 to 5 eV; Co-Pt multilayers; Co/Pt multilayers; Co_1-xPt_x alloys; Kerr rotation; evaporated alloys; exchange polarization mechanism; interband transition; magnetic films; magneto-optical characterization; optical properties; reduced Curie temperature; reflectivity spectra; room temperature; Cobalt alloys; Kerr effect; Magnetic multilayers; Magnetic properties; Magnetization; Magnetooptic effects; Nonlinear optics; Platinum alloys; Polarization; Temperature distribution;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.179687

Filename

179687