Nickel shows the ferromagnetic property at room temperature. If the temperature is increased beyond Curie's te

Question

Nickel shows the ferromagnetic property at room temperature. If the temperature is increased beyond Curie's temperature, then it will show:

Accepted Answer

1. **Ferromagnetism and Temperature:** The magnetic properties of ferromagnetic materials (like Nickel, Iron, Cobalt) are dependent on temperature. In the ferromagnetic state, atomic dipoles are aligned in macroscopic domains .
2. **Curie Temperature:** There exists a critical temperature called the Curie temperature ($T_c$) for every ferromagnetic material. Above this temperature, the thermal agitation becomes sufficient to disrupt the ordered domain structure.
3. **Transition:** When a ferromagnetic substance is heated above its Curie temperature, the domain structure disintegrates, and the material loses its spontaneous magnetization, transforming into a **paramagnetic** substance. It remains paramagnetic at all temperatures higher than $T_c$ .

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