Question

The property possessed by ferromagnetic substance only is

• A. High temperature
• B. Curie
• C. Low curie temperature

Answer 1

Answer: (B)

Curie

Answer 2

Ferromagnetic substances exhibit spontaneous magnetization below a critical temperature known as the Curie temperature ($T_C$). Above this temperature, the material loses its ferromagnetic properties and becomes paramagnetic due to thermal agitation overcoming the exchange interactions that cause alignment of magnetic moments. This characteristic temperature, the Curie temperature, is a defining property of ferromagnetic materials, distinguishing them from paramagnetic and diamagnetic substances which do not exhibit such a phase transition. Therefore, the existence of a Curie temperature is a property uniquely associated with ferromagnetic substances.