MAGNETIC AND MOSSBAUER INVESTIGATIONS OF COGA2-XFEXO4

The magnetic properties of system CoGa2-xFexO4 (x=0.1, 0.2, 0.3, 04, 0 .5, 0.8, 1) with spinel structure were investigated by means of dc sus ceptibility and dc magnetization measurements in magnetic fields 1-12k Oe as well as by means of Mossbauer effect. The results of magnetic me asurements show that compounds with 0.1 less than or equal to m less t han or equal to 0.5 exhibit features typical for spin glasses and ones with x=0.8 and 1 have a ferromagnetic ordering. The compounds with x= 0.8 and 1 exhibit relaxation behaviour in their Mossbauer spectre.