Have you heard of any Curie-limited inductive heating applications?

A Curie transition temperature, mixes of nickels, can be utilized in the same way to design a process which is controlled by the Curie transition temperature. 

Yes. There are a lot of applications where the Curie temperature transition is used. 

As a limit for the heating, we run an application where magnetic steel wires are heated, and at Curie, the magnetic nature of the metal becomes non-magnetic and because of this the heating efficiency drops dramatically, it's almost like the metal heats to Curie but then stays at that Curie temperature, if heated further, that type of a process is used in certain industries. Where you want the heat, you want to heat the metal to Curie, but not above. Then the metal becomes soft enough, to be acted on nickels. A Curie transition temperature, mixes of nickels, can be utilized in the same way to design a process which is controlled by the Curie transition temperature.