EFFECT OF OPTICAL RADIATION ON MAGNETIC-RESONANCE IN FE SI/FE TRILAYER FILMS/

A photoinduced change in the magnetic resonance parameters is observed in trilayer films of the system Fe/Si/Fe. The shifts of the resonance field and the character of the interlayer interaction are investigate d as functions of the temperature, illumination of the films, and thic kness of the silicon interlayer. It is found that at low temperatures the photoinduced contribution to the exchange interaction constant bet ween the iron layers is antiferromagnetic. (C) 1998 American Institute of Physics. [S0021-3640(98)00716-6].