非晶/纳米晶软磁合金的各向异性

Anisotropies of Amorphous/Nanocrystalline Soft Magnetic Alloys

非晶纳米晶合金的各向异性包括磁晶各向异性、磁弹各向异性、感生各向异性等。磁晶各向异性可以通过交换作用平均化;磁弹各向异性可以通过控制饱和磁致伸缩系数和退火消除内应力控制;感生各向异性产生的方式及原因较复杂。普通退火、应力退火和磁场退火都可能产生的感生各向异性,是控制有效各向异性的重要手段,最终决定软磁材料的最终性能。重点介绍感生各向异性,总结产生的内在原因。

The anisotropies in amorphous/nanocrystalline alloys include magnetocrystalline anisotropy, magnetoelastic anisotropy, induced anisotropy, etc. Magnetocrystalline anisotropy can be averaged out by exchange-couple interaction; magnetoelastic anisotropy can be alleviated by controlling the saturation magnetostriction coefficient and eliminating the inner stress. However, when it comes to induced anisotropy, the production type and causes of which are complex. All of conventional annealing, stress annealing and magnetic field annealing can produce the induced anisotropy, three of which are the crucial methods to control the effective anisotropy and the induced anisotropy plays a fundamental role in the final property. This paper focuses on the induced anisotropy and summarizes the internal causes of anisotropy.