Cobalt clearly exhibits ferromagnetic properties at room temperature. If it is continuously heated b

Question

Cobalt clearly exhibits ferromagnetic properties at room temperature. If it is continuously heated beyond its Curie temperature ($1394 \mathrm{~K}$), it will abruptly begin to show

Professor PC Thomas Classes · Answer

(a) : The Curie temperature is the critical temperature above which a ferromagnetic substance loses its spontaneous magnetization due to thermal agitation overcoming the exchange coupling between atomic dipoles. Above this temperature, the material behaves entirely as a paramagnetic substance.