Curie temperature
Curie point

When a laser shines on the track, the switching layer, which has a lower Curie point than the other layers, demagnetises.

As the temperature is increased towards the Curie point, the alignment (magnetization) within each domain decreases.

The transition between the ferromagnetic and paramagnetic phases of magnetic materials at the Curie point.

This is now known as the Curie point.

However, just because it is hotter than the Curie point does not mean it stops being a metal.

The aging process may be reversed by heating the component above the Curie point.

Another approach is to use magnetized soldering tips which lose their magnetic properties at a specific temperature, the Curie point.

During recording, the laser power is increased so it can heat the material up to the Curie point in a single spot.

In magnetic materials, further heat is generated below the Curie point due to hysteresis losses.

"If we heat the material enough, it should reach the Curie point and become demagnetized."