The point at which a magnetic material loses its ferromagnetic properties is called:

The correct answer is option 3):(curie temperature)

Concept:

• Ferromagnetic materials are substances which show spontaneous magnetic nature without any external magnetic field
•  The temperature, at which a ferromagnetic material entirely loses its magnetic properties, is said to be the Curie point.
• The minimum temperature at which a ferromagnetic substance is converted into a paramagnetic substance is defined as Curie temperature

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Additional InformationDiamagnetic Substance: Diamagnetic substances are those which develop feeble magnetization in the opposite direction of the magnetizing field.

Paramagnetic substances: Paramagnetic substances are those which develop feeble magnetization in the direction of the magnetizing field.