Question

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

• A. anti ferromagnetism
• B. no magnetic property
• C. diamagnetism
• D. paramagnetism

Answer 1

The correct option is D paramagnetism

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 $\left(D\right)$ is the correct answer.