Question

what is ferrromagnetic subtances​

Answer 1

The article Ferromagnetic material properties is intended to contain a glossary of terms used to describe ferromagnetic materials, and magnetic cores.

Answer 2

Answer:

ferromagnetic substances contains permanent atomic magnetic dipoles

… Ferromagnetism is a kind of magnetism that is associated with iron, cobalt, nickel, and some alloys or compounds containing one or more of these elements.

they have net dipole in any one direction and is not balanced.