Abstract
Magnetic anisotropy in Fe-based amorphous ribbon plays an important role in various applications and is still not fully understood. To gain an in-depth understanding of this phenomenon, the structure and magnetic properties of Fe78Si9B13 master alloy ingots and melt-spun amorphous ribbons were measured by various techniques. For the ingot samples, both the <100>α-Fe and <001>Fe2B axes are aligned parallel with the radial direction (RD) of the original cylindrical ingot, i.e. the maximum temperature gradient direction, and their other orthogonal axes have several preferred directions in the plane vertical to RD. The hard magnetic axis of the ingot samples is parallel to RD, which is due to the large magnetocrystalline anisotropy energy difference between <001> and {001} of the Fe2B phase. For the amorphous ribbons, there is an in-plane magnetic anisotropy: the easy or hard axis of magnetization is aligned on the plane of the ribbon, and parallel to or at an angle of about 60° to its width direction, respectively. According to the structural heredity between the melts and glasses/crystals during solidification, we deduce that the magnetic anisotropy in the ribbon plane is ascribed to the orientation alignment of Fe-Si and Fe-B clusters, i.e. a hidden order beyond short-range order, in Fe78Si9B13 amorphous ribbons.
Highlights
Fe-Si-B metallic glasses are the most widely used amorphous material due to their excellent soft magnetic properties, good glass-forming ability and low cost.[1,2,3] they have been extensively investigated, many areas have not been fully understood, attract a lot of the attention of researchers.[4,5,6] The magnetic anisotropy in Fe-Si-B amorphous ribbons is one of the such important areas that requires better understanding
By using Magneto-optical kerr effect (MOKE), vibrating sample magnetometer (VSM) and ferromagnetic resonance (FMR) methods, we examined the magnetic anisotropy in the plane of Fe78Si9B13 amorphous ribbons and explained the easy and hard axes of ribbons by structure heredity during solidification as well as the hidden ordering arrangement in amorphous alloys
The vertical ingot (V-Ingot) sample shows spot-like Fe-B precipitates of diameters in the range 0.5-1.5 μm distributed in the matrix, whereas in the horizontal ingot (H-Ingot) sample, these precipitates are more elongated and aligned parallel to the radial direction (RD) of the original cylindrical ingot
Summary
Fe-Si-B metallic glasses are the most widely used amorphous material due to their excellent soft magnetic properties, good glass-forming ability and low cost.[1,2,3] they have been extensively investigated, many areas have not been fully understood, attract a lot of the attention of researchers.[4,5,6] The magnetic anisotropy in Fe-Si-B amorphous ribbons is one of the such important areas that requires better understanding. The out-of-plane anisotropy and heat treatment induced anisotropy are caused by internal stress and magnetostrictive effects.[10,11,12,13] the formation of the in-plane anisotropy has not been fully understood
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
