MAGNETIC-ANISOTROPY DISTRIBUTION IN TRANSVERSE AND OBLIQUELY FIELD ANNEALED AMORPHOUS RIBBONS

Anisotropies with different angles with respect to the perpendicular direction have been induced in amorphous ferromagnetic ribbons by magnetic annealing. The direction of the anisotropy and its dispersion have been tested with the experimental techniques that are sensitive to it: the resonance-antiresonance method of measuring the DELTAE effect, and the second harmonic method of obtaining the anisotropy distribution. The results obtained in these samples are analyzed with standard models that assume easy axes perpendicular to the direction of the magnetic field, as well as more elaborate ones. It is concluded that the large angular dispersion of the anisotropy mask any accurate evaluation of the anisotropy angle in the basis of these methods and models.