Curie temperature above which (a) paramagnetic material becomes ferromagnetic material (b) ferromagnetic material becomes diamagnetic material (c) ferromagnetic material becomes paramagnetic material (d) paramagnetic material becomes diamagnetic material

Answer: (c). Below the Curie temperature TC, a ferromagnet has aligned domains and strong magnetisation. Above TC, thermal agitation destroys the domain alignment, and the material obeys the Curie–Weiss law χ = (C)/(T - TC) like a paramagnet. So the answer is (c): a ferromagnetic material becomes paramagnetic.

Curie temperature above which | NEET 2008 (AIPMT)

Q37NEET 2008 · AIPMTEasy

Magnetic Materials & Curie Law

Curie temperature above which

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Answer: (c)

Below the Curie temperature $T_C$ , a ferromagnet has aligned domains and strong magnetisation.
Above $T_C$ , thermal agitation destroys the domain alignment, and the material obeys the Curie–Weiss law $\chi = \dfrac{C}{T - T_C}$ like a paramagnet.
So the answer is (c): a ferromagnetic material becomes paramagnetic.

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