Using N,N'-dimethylacetamide (DMA) as hybrid ligand, some rare earth- iron cyano-bridge complexes have been synthesized and the crystal structures and magnetic properties of three complexes ([SmFe)~n, Gd~2Fe, HoFe) have been determined. The results reveal that the same series complexes show the different crystal structures: one- dimensional chain, trinuclear and dinuclear structures. meanwhile it is found that these three complexes have excellent magnetochemical properties, especiaaly [SMFe]~n exhibits long-range magnetic ordering, critical temperature (T~c=3.5K) and stronger coercive force (H~c=1400 Oe).

Key words: RARE EARTH METAL COMPLEX, POTASSIUM FERRICYANIDE, CRYSTAL STRUCTURE, MAGNETIC CHEMISTRY, SAMARIUM COMPLEX, GADOLINIUM COMPLEX