What is Curie temperature? What is the working temperature of a magnet?
The operating temperature of a magnet is the highest temperature at which a magnet can remain magnetically.
Curie also called Curie point temperature or magnetic transition point, refers to the material can be changed between the magnet and the magnet temperature, phase transition temperature of ferroelectric ferroelectric phase transition from the paraelectric phase into the lead. It can also be said that there is a transition temperature of the two phase transition. Below the temperature of the Curie point, the substance becomes ferromagnetic, where the magnetic field associated with the material is difficult to change. When the temperature is higher than the temperature of the Curie point, the material becomes a paramagnetic material, and the magnetic field of the magnet can easily change with the change of the surrounding magnetic field. The magnetic susceptibility is about 10 minus 6 times.
The ferromagnetic material is magnetized with strong magnetism, but with the increase of temperature, the thermal motion of metal lattice intensifies will affect the ordered domain moment, when the temperature reaches the neat enough to break the domain magnetic moment, magnetic domain disintegrated, the average magnetic moment becomes zero, the ferromagnetic material magnetic disappear into CIS magnetic material, a series of ferromagnetic properties associated with magnetic domains (such as high permeability, hysteresis loop, magnetostrictive etc.) disappeared. The permeability of the ferromagnetic material of the corresponding permeability into paramagnetic substance. The temperature corresponding to the disappearance of ferromagnetism is the Curie point temperature.
In fact, the Curie temperature is only the temperature under the laboratory condition, or it can be said to be the ideal temperature, and the working temperature of the magnet is that the material is the highest temperature to keep the magnetism in the actual situation.
