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Ferromagnetism and Curie Temperature
Concepts tested here
- Curie temperature
All Questions
2008 AIPMT 1 question
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Curie temperature is the temperature above which -In a ferromagnetic material the atomic magnetic moments are aligned parallel to each other inside small regions called domains.
When the material is heated, thermal agitation increases and starts disturbing this alignment.
Above a certain temperature, called the Curie temperature $T_C$, the domain structure is destroyed completely.
The material then behaves like a paramagnetic substance, with susceptibility $\chi = \dfrac{C}{T - T_C}$ (Curie-Weiss law).
So the Curie temperature is the temperature above which a ferromagnetic material becomes a paramagnetic material.