Magnetically Soft Materials磁性软材料
Ferromagnetic materials in which the magnetic field can can be easily reversed are said to be magnetically soft. They may have high permeability but very small coercivity, and therefore have very narrow hysteresis loops. 能够轻易使磁场所以反转的铁磁性材料被称为磁性软材料。它们可能具有较高的磁导率但非常小的矫顽力，因此具有非常狭窄的磁滞回路。
Commercial magnetically soft materials are usually made from alloys of iron and nickel with compositions around Ni80Fe20. Commercial materials have names like 'Permalloy', 'Hymu' and 'Mumetal' and are characterized by high initial permeability and narrow, square hysteresis loops. Myers quotes typical values of remanence at 0.8 times saturation and coercivity about 2 μT. 商用的软磁材料通常由铁和镍的合金制成，其成分接近Ni 80 Fe 20。商用材料有如'Permalloy'、'Hymu'和'Mumetal'这样的名称，其特点是初始磁导率高，磁滞回路狭窄且接近方形。Myers指出典型的剩磁约为饱和磁通密度的0.8倍，矫顽力约为2 μT。
Magnetically soft materials are used for the cores of transformers to reduce the energy losses associated with the reversing fields of the AC currents. Such cores are used in coils up to radio frequencies to increase the inductance. 用于变压器铁芯的软磁材料，用于减少交流电流反向磁场相关的能量损耗。这类铁芯可用于到无线电频率的线圈以增加电感。
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Index References Myers Ch 11 索引参考Myers第11章 | ||
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