MAGNETIC-RELAXATION AND SOFT-MAGNETIC PROPERTIES OF ANNEALED AMORPHOUS FEZRCUB ALLOY

In the work presented, we have investigated temperature dependences of the relative permeability and the relative resistivity of amorphous F eZrCuB alloys with increasing and decreasing temperatures in the range 50-600 degrees C. Curie and crystallization temperatures were estimat ed from the analysis of measured dependences. The spectra of magnetic after-effect (MAE) were measured in the temperature range (-100 degree s C, T-c). Two maxima in the relaxation spectra have occurred at the t emperatures - 30 and 70 degrees C. The first maximum corresponds with the magnetic relaxation and the second corresponds with magnetic after -effect induced by phase transition. The spectrum of activation energy of magnetic relaxation was found by computer analysis. The most proba ble value of the activation energy is 1.25 eV. In this work, we have a lso studied microstructures of samples annealed near the crystallizati on temperature. (C) 1997 Elsevier Science S.A.