When materials possessing long range magnetic order (e.g., ferromagnetism, antiferromagnetism and ferrimagnetism) are reduced in size they can show unique properties as compared with bulk materials. One of the ways to reduce the size of the ordered magnetic regions is to isolate them inside non-magnetic species. The present paper describes in-situ room temperature synthesis of composites of fine magnetic particles in the polymer matrix of aniline-formaldehyde and their characterization using Mössbauer spectroscopy.