When ferromagnetic substances are heated strongly, its magnetic moment

When a magnetic substance is heated, then it

When a magnetic substance is heated, then it

Why does an anti-ferromagnetic substance have zero resultant magnetic moment?

Assertion : Ferromagnetic substances are strongly attracted by magnetic field. Reason : Ferromagnetism arises due to spontaneous alignment of magnetic moments in the direction of applied magnetic fields.

What is the change in domain structure, when ferromagnetic substance is placed in weak external magnetic field?

(A): Antiferromagnetic substances possess almost zero magnetic moment (R): There are no unpaired electrons in anti ferromagnetic substances