A series of FexAg1-x(x = 18, 45, 81) samples were prepared by ion beam sput
tering and post-annealed in vacuum at different temperatures for one hour.
X-ray diffraction, optical and magneto-optical measurement were performed a
nd the structure, optical and magneto-optical Kerr effect properties for di
fferent annealing temperatures have. been studied. Results show that the ma
gneto-optical Kerr effects are closely related to the particle size.