THE RADIO-FREQUENCY EFFECTS AND THE SOFT-MAGNETIC PROPERTY OF AMORPHOUS AND NANOCRYSTALLINE FECUNBMOSIB ALLOYS

The correlation of the magnetostriction and magnetic anisotropy with t he soft magnetic performances of amorphous and nanocrystalline Fe73Cu1 Nb1.5Mo2Si12.5B10 was studied through Mossbauer measurements. When a s ample was exposed to a radio frequency (r.f.) field, the Mossbauer spe ctrum would demonstrate two r.f. effects: side band effect and collaps e effect. The above two properties can be judged from the r.f. effects . When the crystallinity of an annealed sample is about 60% and the av erage diameter of crystalline grain is in the range of 10-20 nm, the s oft magnetic performances of the nanocrystalline material are optimum, the magnetostriction coefficient descends to zero and magnetic anisot ropy comes to a minimum simultaneously. Copyright (C) 1996 Elsevier Sc ience Ltd