Magnetic and Magneto-optic Study of a Layered Co/Pt - Dysprosium-Iron-Garnet System

Authors

J.M. Meldrim, University of Nebraska - Lincoln
Roger D. Kirby, University of Nebraska-LincolnFollow
M.J. DeVries, University of Nebraska - Lincoln
John A. Woollam, University of Nebraska-LincolnFollow
David J. Sellmyer, University of Nebraska-LincolnFollow

Document Type

Article

Date of this Version

July 1998

Comments

Published IEEE Trans. Magn. 34, 1991 (1998). Used by permission.

Abstract

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 lOOO Å while the ColPt 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.