Dependence of thermal relaxation and hysteresis on microstructure in nanocrystalline soft magnetic materials

Magnetic properties of nanocrystalline Finemet ribbons with composition Fe/sub 73.5/Cu/sub 1/Nb/sub 3/Si/sub 13.5/B/sub 9/ are studied. Six different samples annealed for 1 hour at different temperatures are studied. Measurement of hysteresis loops and of relaxation, performed at temperature above the Curie point of the amorphous phase, are presented and discussed.