Investigation of the soft magnetic properties of FeCuNbB alloys

The alloy system of Fe86-xCu1NbxB13 (x=4, 5) was subject to an investigatio n of its soft magnetic properties. The amorphous ribbons were annealed for 1 hour at different temperatures in order to obtain samples in different crystallisation states including the nanocrystalline state After that a phase analysis was done using room tempe rature Mossbauer spectrometry. The sofi magnetic properties were studied us ing the Mossbauer effect in radio frequency (rf) magnetic fields. We could show that classical measurements, like those of the coercive force H-C corr espond well to the results obtained by our rf Mossbauer measurements. (C) 1 999 Acta Metallurgica Inc.