ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
We prepared by vapor deposition at room temperature thin (500 A(ring)) Co/Pt multilayers or layered structures directly onto glass or Si substrates. They show a preferential magnetization perpendicular to the film plane for Co thicknesses below 12 A(ring) and a 100% perpendicular remanence for Co thicknesses below 4.5 A(ring). The magnetic anisotropy can be explained by an interface contribution to the anisotropy. We also investigated the magneto-optical (MO) polar Kerr effect of these multilayers. Because of their excellent magnetic properties and their potentially high oxidation and corrosion resistance, these Co/Pt-layered structures are very promising candidates for MO recording. The Kerr rotation θk at λ=820 nm for a 35×(4.0 A(ring) Co+12.7 A(ring) Pt)-layered structure, which has 100% magnetic remanence, is modest (−0.12°), but the reflectivity R is high (70%), which results in a respectable figure of merit Rθ2k. Furthermore, the Kerr effect increases towards shorter wavelengths and thus favors future higher-density recording.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.343189
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