What are the Curie and Néel temperatures, and what happens to a core if you exceed the specified Curie or Néel temperature?
The Curie temperature refers to the transition temperature above which ferromagnetic materials lose their useful magnetic properties. Ferrite materials are actually ferromagnetic materials [a similar but distinctly different type of magnetic material], and thus this transition temperature in ferrite cores is more correctly referred to as the Néel temperature. When the Néel temperature is surpassed the core is rendered useless in the circuit.
