Nickel shows ferromagnetic property at room temperature. If the temperature is increased beyond Curie…

Nickel shows ferromagnetic property at room temperature. If the temperature is increased beyond Curie temperature, then it will show:
  1. anti ferromagnetism
  2. no magnetic property
  3. diamagnetism
  4. paramagnetism.

Solution

Nickel exhibits ferromagnetism due to a quantum physical effect called exchange coupling.
If the temperature of a ferromagnetic material is raised above a certain value, called curie temperature, the coupling ceases to be effective.
Most such material then becomes simply paramagnetic.
Hence option (D) is the correct answer.

Asked in: NEET 2007

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