What is a ferromagnetic?
Introduction mentioned ferromagnetism, refers to a kind of material of magnetic condition, has the spontaneous magnetization phenomenon.
All the material in iron is the most well known, so named.
Some materials under the effect of external magnetic field and after magnetization, disappear, even if the external magnetic field can still stick to their conditions of magnetization and magnetic, known as spontaneous magnetization phenomenon.
All of the permanent magnet has a ferromagnetic or ferrimagnetic.
Basically ferromagnetic this concept including Ren An appeared without external magnetic field of magnetic material.
Someone is still so used this concept.
But through the different manifestation of magnetic materials and magnetic more deeply know, scholars have made more precise definition for the concept.
A matter of the original cell all the magnetic ions are pointing in the direction of its magnetic when called is ferromagnetic.
If as long as part of the ion direction pointing its magnetic field, it is called a ferrimagnetic.
If the magnetic ions has pointed out the direction of the just cancel each other out,
Although all the magnetic ions to only two opposite directions)
Is known as the antiferromagnetism.
Material of magnetic phenomenon exists a critical temperature, the temperature would attack.
About ferromagnetic and ferrous magnetic materials, the temperature is known as the Curie temperature;
About the ferromagnetic material, the temperature is called Neil.
Someone think magnets attract effect between ferromagnetic material and is the earliest human know of magnetism.
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