Induced Magnetic Anisotropy and Structure of Nanocrystalline Fe-Co-Cu-Nb-Si-B Alloys with Different Content of Co: I. Stress-Annealing-Induced Magnetic Anisotropy and Its Thermal Stability

摘要

It is shown that the substitution of Co for Fe in the amorphous Fe_(73.5)Cu_1Nb_3Si_(13.5)B_9 alloy leads to the change in the type of magnetic anisotropy induced in the alloy as a result of a thermomechanical treatment at 520 deg C. The type of the induced magnetic anisotropy determines the functional characteristics of these alloys as soft magnetic materials. With the content of Co in the alloy equal to 10 at percent Co, there is induced a magnetic anisotropy with the direction of the easy axis across the ribbon axis (transverse induced magnetic anisotropy), just as in the alloy without Co. Upon the introduction of 20-30 at percent Co into the alloy, the induced magnetic anisotropy becomes longitudinal, with the easy-axis direction along the ribbon axis. The thermal stability of the magnetic properties of the alloys with induced magnetic anisotropy has been investigated.