Faraday effect of europium organic glass in megagauss magnetic fields

The Faraday rotation of europium organic glass (based on polymethyl methacr ylate) in megagauss fields is investigated experimentally and theoretically . The experiment was performed using an MK-1 magnetic explosion generator a nd laser radiation at the wavelength lambda = 0.85 mu m at T = 30 K. It is found that the dependence of the rotation angle of the polarization plane o n the magnetic field is nonlinear. The theoretical results are compared wit h the experimental data. The contribution of the orbital angular momentum o f europium ions to the Faraday effect is revealed. The conclusion is drawn that the previously found anomalies of the Faraday effect for the laser rad iation at the wavelength lambda = 0.63 mu m are brought about by the magnet ooptical resonance, which is induced by the ultrastrong field. (C) 2000 MAI K "Nauka/Interperiodica".