Three Forms of Magneticity
So why not everything is magnetic? In fact, everything is magnetic. Because moving electrons produce magnetic fields, and everything is composed of electrons, everything must be magnetic. However, some materials show stronger magnetism, while others show very weak magnetism. why is that?
Q1, iron magnetic
We have already talked about the problem of unpailable electronics. When these unpaclatic electrons remain consistent without external magnetic fields or currents, we have permanent magnets, called iron magnets. The iron magnet will be strongly magnetized in the magnetic field. Even if the magnetic field is removed, the iron magnet still maintains a magnetized state.
This is the “magnet” we often say, because this behavior was originally observed in natural iron ore (magnet ore FE₃O ₄). However, even the magnetism of the permanent iron magnet is not fixed. For example, if you heat a iron magnet to 800 ° C (~ 1500 ° F), it will lose magneticity.
In addition to iron, there are nickels, rhodium, cobalt, and other metals found with iron magnetic. Most strong permanent magnets today are made of 钕.
Q2, smooth magnetism
When we put some materials in the magnetic field, they are temporarily magnetic. Once the magnetic field is removed, these materials will return to their usual non -magnetic state. Most non -metal and aluminum metals have the characteristics of custody. Because their magnetism is weak, we will not notice in general, this will give us an illusion that they will not be magnetized. But there are many ways to prove their weakness. One method is a small experiment that we will talk about later. Forms of Magneticity
In the custody material, the electrons in the atom have a permanent torque spin. Due to thermal exercise, the direction of these torque is random. This is why the net magnetic torque of the magnetic material is zero. When we place the magnetic material in the external magnetic field, those tiny magnetic puppets are arranged in the direction of the magnetic field and magnetized. Magnetic elements include aluminum, platinum, oxygen, lithium, sodium, calcium and many other elements.
Q3, anti -magneticity
Imagine what should it be called by the opposite of the magnetic magnetic? That’s right! That is anti -magnetic. The ferromagnetic and smooth magnetic material “allows” to be magnetized by itself, while antimagnetic materials resist and exclude magnetic fields outside themselves. This is because the direction of the tiny magnetic puppet poles in the antimagnetic material is opposite to the external magnetic field.
The magnetic torque of each antimagnetic atom is zero, because all the magnetic puppets are randomly oriented (the same as cashmere material), but when we put this material in a strong external magnetic field, all magnetic fields, all the magnetic fields The even polezi will be aligned and excluded by the external magnetic field. When we remove the field, everything returns to normal. Forms of Magneticity
There are many carbon -based substances in water. Some anti -magnetic elements include gold, silver, copper, hydrogen, nitrogen, mercury, lead, silicon and so on.