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

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5 Author(s)
Meldrim, J.M. ; Center for Mater. Res. & Anal., Nebraska Univ., Lincoln, NE, USA ; Kirby, R.D. ; DeVries, M.J. ; Woollam, J.A.
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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

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Magnetics, IEEE Transactions on  (Volume:34 ,  Issue: 4 )