Curielämpötilaan

Curielämpötilaan refers to the Curie temperature, a critical point in physics named after Pierre Curie. It is the temperature at which a ferromagnetic material transitions into a paramagnetic material. Above this temperature, the material loses its permanent magnetism. Conversely, when cooled below the Curie temperature, a paramagnetic material can regain its ferromagnetic properties. This phenomenon is crucial in understanding magnetism and has applications in various technologies.

The Curie temperature is a fundamental property of each ferromagnetic substance and varies significantly. For instance, iron has a Curie temperature of around 770 degrees Celsius, while nickel is around 358 degrees Celsius. This transition occurs because at temperatures above the Curie point, the thermal energy of the atoms is sufficient to overcome the forces that align their magnetic moments, leading to a disordered arrangement characteristic of paramagnetism. Below the Curie temperature, these alignment forces dominate, resulting in the spontaneous alignment of magnetic moments that define ferromagnetism.