Der Zusammenhang zwischen dem magnetooptischen Kerr- und Faraday-Effekt und die optischen Konstanten von dicken Aufdampfschichten aus Eisen, Kobalt und Nickel

Abstract

The magnetical rotation of the plane of polarisation and the ellipticity of the reflected and transmitted light through magnetically saturated, evaporated layers of iron, cobalt and nickel (30 to 100 mtz ) are dependent one another according to the tShenomenological theory of W. VOIGT. The four measured magnetooptical angles are however independent each other. By comparison of other physical properties, except the magnetooptical ones, (f.e. magnetical saturation, optical absorption) measured respectively with transmitted and with reflected light, we try to prove, that the layers are homogenous at least near the glass-side. The linear increase of Faraday-rotation and optical absorption with the thickness of the layer supports this assumption. Then the independence can only be explaned by a magnetooptical term in the second equation of Maxwell also (precession of spin).The knowledge of the optical constants ist necessary for the comparison ot magnetooptical ones. They are find out by measurements of intensity only, using the transmitted light and the reflected light at both sides of the layer. By supernumerary kinds of determination the fonlt is estimated. The method of Drude is adapted to measurements of intensity and then applied on the glasside too. The results on this side agree with those of transmitted light, the air-side differs a little.

Magnetotransverse Scattering of Surface Plasmon Polaritons

“…Note that, in this geometry, the demagnetization factors are close to unity and not exactly the same for the islands and the homogeneous film, so some scaling of the magnetic field axis may be necessary to trans- late the film results to island values. The observed Kerr rotation at B 0.2 T corresponds to a Verdet constant of 3.3 3 10 5 rad͞m, which is about a factor of 2 smaller than the literature saturation value on bulk cobalt [18]. The magnetotransverse SPP scattering by the cobaltsilver films was measured in the way as indicated above.…”

“…We therefore introduced additional scatterers with a high Verdet constant on the silver surface. Cobalt was chosen as a scatterer material because of its high lock-in magneto-optical activity [18], and because of its ferromagnetic properties. This latter aspect implies that small external magnetic fields can evoke a large magneto-optical response.…”

Hybrid Molecular-Based Magnets Containing Organic NLO Chromophores: A Search toward an Interplay between Magnetic and NLO Behavior

“…By contrast, θ no longer depends on the external magnetic field but on the internal magnetization in the case of propagation through a permanent magnet. The specific rotations ( θ F ) of magnetic materials scale over many decades and can reach as high as 10 5 −10 6 deg cm -1 , , which leads to large rotations even upon transmission through thicknesses around 1 μm.…”

Organic Nonlinear Optical Chromophores in an Inorganic Environment. Toward an Interplay between Magnetism, Conductivity, and Nonlinear Optics

“…By contrast, θ no longer depends on the external magnetic field but on the internal magnetization in the case of propagation through a permanent magnet. The specific rotations ( θ F ) of magnetic materials scale over many decades and can reach as high as 10 5 −10 6 deg cm -1 , , which leads to large rotations even upon transmission through thickness around 1 μm.…”