Question

The curie temperature is that at which :

• A. Semi-conductor becomes conductors
• B. Ferromagnetic becomes paramagnetic
• C. Paramagnetic becomes diamagnetic
• D. Metals become super conductor

Answer 1

The correct option is B Ferromagnetic becomes paramagnetic

Curie temperature $T_C$ is the temperature at which certain materials lose their permanent magnetic properties, to be replaced by induced magnetism.

Above the Curie temperature, the material is paramagnetic, as the atoms lose their ordered magnetic moments when the material undergoes a phase transition.

When Temperature is increased from below $T_C$ to above $T_C$, Ferromagnetic becomes Paramagnetic.

Antiferromagnetic becomes Paramagnetic.

Only Option-B is correct.