The soft ferrite contains Ni, Zn, and/or Mn compounds are used in transformer or electromagnetic cores. They have a low coercivity so they are called soft ferrites. The low coercivity means the material’s magnetization can easily reverse direction without dissipating much energy, while the material’s high resistivity prevents eddy currents in the core, another source of energy loss. Because of their comparatively low losses at high frequencies, they are extensively used in the cores of RF transformers and inductors in applications such as switched‐mode power.
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