What is ferromagnetnetic?

Answer 1

A material which may be magnetize or convert into magnet, it is derived from ferrium means Iron.

Answer 2

Ferromagnetic materials are substances that exhibit strong magnetic properties due to their atoms aligning in a parallel manner. These materials can be permanently magnetized and will retain their magnetism even after being removed from an external magnetic field. Examples of ferromagnetic materials include iron, cobalt, and nickel.