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NEET 2007 (AIPMT) · Magnetic Materials & Curie Law

Magnetic Materials & Curie Law question from NEET 2007 (AIPMT)

Q38NEET 2007 · AIPMTEasy

Magnetic Materials & Curie Law

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

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Answer: (d)

Nickel is ferromagnetic below its Curie temperature.
Above the Curie temperature the domains break up and the dipoles are only weakly aligned by the field, so $\chi = \dfrac{C}{T - T_C}$ is small and positive.
So the answer is (d) paramagnetism.

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