Effective anisotropy and magnetostriction of the amorphous and nanocrystalline Fe/sub 83/Zr/sub 7/B/sub 8/Cu/sub 2/ alloy

摘要

The effective magnetic anisotropy and saturation magnetostriction of both amorphous and nanocrystalline (samples with different microstructures) Fe/sub 83/Zr/sub 7/B/sub 8/Cu/sub 2/ alloy have been investigated. The effective anisotropy results were obtained through the measurement of the bias field dependence of the transverse susceptibility in samples annealed from 480 to 600/spl deg/C. In the above mentioned range, the annealing temperature dependence of the saturation magnetostriction is related to the presence of a nanocrystalline structure leading to a remarkable magnetic softening. From our results it was possible to discern the occurrence of intergranular coupling and to evaluate the typical dimensions of the coupled units.