Magnetic properties and relaxation processes of magnetic anisotropy in amorphous magnetic ribbons due to heat treatment

Thermally activated processes for as-quenched samples of amorphous ribbons of five kinds in which the sample possessing the negative λ is included are studied. It has been shown that the processes depend on the number and species of transition elements included in ribbons. Ribbons including plural transition elements have respectively different values of ΔE at each stage of activated process. The brittle ribbon in the as-quenched state has larger time constants and higher activation energies than the others. The estimated values of activation energies were ranging from 0.7 eV to 1.8 eV. They are regarded as the energies which correspond with the stress relief. No. influence of the sign of λ on the processes has been observed. Only the FeNiPB ribbon has shown the complex variation of magnetic properties with annealing.