REVERSIBLE MAGNETIZATION OF FERRITE-GARNET FILM BY POLARIZED-LIGHT

The effect of low-powered polarized light on magnetic characteristics of ferrimagnetic garnet films has been studied at room temperatures by means of magneto-optical Faraday effect. A local magnetization of the film, occurred under the illumination, was carried out in the directi on determined by orientation of polarization vector. The effect, accom panied by the domain structure reconstruction, caused also changes of the mechanical strain and dichroism. The spectral, polarization, ampli tude and temperature dependences were investigated in order to explain the origin of such a photomagnetic effect. Peculiarities of the effec t and their correlation with parameters of the films and illuminated l ight are discussed in terms of the developed early models, based on li ght induced recharging of the polarization-sensitive anisotropic centr es. The additional magnetostriction mechanism is assumed to be respons ible for displaying of the observed phenomena.