Magnetic and magneto-optic study of a layered Co/Pt-Dysprosium-iron-garnet system

Author

Meldrim, J.M. ; Kirby, R.D. ; DeVries, M.J. ; Woollam, J.A. ; Sellmyer, D.J.

Author_Institution

Center for Mater. Res. & Anal., Nebraska Univ., Lincoln, NE, USA

Volume

34

Issue

4

fYear

1998

fDate

7/1/1998 12:00:00 AM

Firstpage

1991

Lastpage

1993

Abstract

We have studied the effects of placing Co/Pt multilayers on dysprosium-iron-garnet doped with bismuth and aluminum. The garnet was deposited by RF-magnetron sputtering and crystallized by rapid thermal annealing. The Co/Pt multilayers were then deposited by DC-magnetron sputtering. The garnet thickness was held constant at 1000 Å while the Co/Pt multilayer had the form of [3 Å Co/9 Å Pt]_n with n ranging from 1 to 16. Coercivities of the samples ranged from about 300 to 2000 Oe. Kerr rotations were as high as 1.8° and ellipticities up to 2° depending upon the wavelength of light and the number of Co/Pt bilayers. Magneto-optic signal figures of merit are determined for several of these composite systems

Keywords

Kerr magneto-optical effect; cobalt; coercive force; dysprosium compounds; garnets; magnetic multilayers; platinum; rapid thermal annealing; sputtered coatings; Co-Pt; Co/Pt multilayer; DC magnetron sputtering; DyFe5O12; DyIG; Kerr rotation; RF magnetron sputtering; coercivity; composite system; dysprosium iron garnet substrate; ellipticity; figure of merit; magnetic properties; magneto-optic properties; rapid thermal annealing; Aluminum; Bismuth; Coercive force; Crystallization; Garnets; Magnetic multilayers; Magnetooptic effects; Nonhomogeneous media; Rapid thermal annealing; Sputtering;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.706767

Filename

706767