The critical temperature above which ferromagnetic materials lose their magnetic property is called

Q. The critical temperature above which ferromagnetic materials lose their magnetic property is called

A. Kelvin Point
B. Curie Point
C. Recrystallizaion point
D. Celsius Point

Answer: Curie Point

Below the Curie temperature, the atoms are aligned and parallel, causing spontaneous magnetism; the material is ferromagnetic. Above the Curie temperature, the material is paramagnetic, as the atoms lose their ordered magnetic moments when the material undergoes a phase transition.

Curie Point was discovered by Pierre Curie that beyond a certain temperature ferromagnetic materials lose their magnetic properties, i.e. the ability to have a net magnetization in the absence of an external magnetic field. This so-called critical temperature (or the Curie point) is different for each material.