Question

What happens above Curie temperature?

Answer 1

1. During heating when the temperature exceeds a specific range, the ferromagnetic material turns into a paramagnetic material. This temperature is the Curie temperature of ferromagnetic material
2. In a ferromagnetic substance at normal temperature, the atoms have proper alignment and are parallel. They have organized magnetic moments.
3. During heating when the temperature reaches above the Curie temperature, the substance goes through a phase change, atoms no longer retain the organized magnetic moments and become paramagnetic.
4. Example - metals like Iron, Nickel, and Cobalt above $360°\mathrm{C},770°\mathrm{C}$ and $1121°\mathrm{C}$ lose their ferromagnetism and turn into paramagnetic material.
5. Hence. above the curie temperature, a ferromagnetic material becomes paramagnetic.