Curie temperature is the temperature above which (a) a...

Curie temperature is the temperature above which
(a) a ferromagnetic material becomes para-magnetic
(b) a paramagnetic material becomes diamagnetic
(c) a ferromagnetic material becomes diamagnetic
(d) a paramagnetic material becomes ferro-magnetic

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Key Concepts

Curie Temperature

This is the specific temperature at which a ferromagnetic material undergoes a transition to a paramagnetic state. At temperatures above the Curie point, thermal energy disrupts the alignment of magnetic moments, causing the loss of spontaneous magnetization.

Ferromagnetism

Ferromagnetism refers to the phenomenon where magnetic moments in a material naturally align parallel to each other below a certain temperature, leading to a strong, permanent magnetization. This alignment is disrupted at higher temperatures.

Paramagnetism

Paramagnetism is a type of magnetism where materials have unpaired electrons that align with an externally applied magnetic field, but do not maintain any spontaneous magnetization once the external field is removed. In ferromagnetic materials above the Curie temperature, the ordered magnetic state transitions to a paramagnetic state.

Magnetic Phase Transition

This concept describes the change in the magnetic properties of a material as it crosses a critical temperature, such as the Curie temperature. It involves a shift from an ordered magnetic state (ferromagnetism) to a disordered one (paramagnetism) due to thermal agitation.

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