Abstract
Since it was discovered that stress annealing induced larger anisotropies compared to other annealing methods in amorphous and nanocrystalline alloys, there has been a lot of research done to explain this phenomenon. This has led to many suggestions about the origin of this stress-induced magnetic anisotropy, but till now the origin is explained with two competing models: the magnetoelastic effect model and the diatomic pair ordering model. In spite of these theories, the origin of the stress-induced anisotropy is still under discussion because direct observation of structural anisotropy is still lacking. In this paper, we have reviewed some of the characterization techniques which have been used to discuss the origin of stress-induced magnetic anisotropy and the progress which has been made thus far in unifying all the contrasting views which has been suggested to be the origin of the stress-induced anisotropy in FINEMET alloys.
Highlights
On the macroscopic level, a magnet is labelled by its north and south poles, on the microscopic level, magnetism is dependent on whether a material is crystalline or non-crystalline [1]
This has led to many suggestions about the origin of this stress-induced magnetic anisotropy, but till the origin is explained with two competing models: the magnetoelastic effect model and the diatomic pair ordering model
We have reviewed some of the characterization techniques which have been used to discuss the origin of stress-induced magnetic anisotropy and the progress which has been made far in unifying all the contrasting views which has been suggested to be the origin of the stress-induced anisotropy in FINEMET alloys
Summary
A magnet is labelled by its north and south poles, on the microscopic level, magnetism is dependent on whether a material is crystalline or non-crystalline [1]. Nanocrystalline alloys produced by the partial crystallization of FeCuNbSiB amorphous alloys are one of the best known soft magnetic alloys [3] [4] These alloys possess excellentpermeability while maintaining a high saturation magnetization, low coercivity, high electrical resistivity, high Curie temperatures and low energy losses all of which make them suitable candidates for most industrial and technological applications [4] [5] [6]. After the amorphous alloys have been annealed they possess a two-ferromagnetic phase microstructure of nanocrystalline grains dispersed or surrounded in an amorphous matrix Knowledge of these magnetic properties are helping develop state of the art magnetic sensors and data storage materials which play a key role in modern technology. The formatter will need to create these components, incorporating the applicable criteria that follow
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