Why are there only magnets in the world, but magnetic copper and magnetic aluminum don't exist?

I believe that readers have played with magnets when they were young, but it is strange that only magnets that attract iron have no magnetic copper and magnetic aluminum. This is because of the problem of magnetic substances. Magnets have magnetic substances, but magnetic copper or magnetic aluminum do not contain magnetic substances, so they are not magnetic.

We all know that ancient magnets were born with magnetic substances. According to scientists' speculation, it is iron trioxide containing this substance that will attract cobalt and nickel, that is, magnets as we know them can be adsorbed, while copper and aluminum are not magnetic, so they cannot be attracted by magnetism and can not adsorb iron. , but also pay attention to permanent magnet materials.

Although magnetic copper and magnetic aluminum do not exist, copper and aluminum are electric, which is a distance from power generation that we learned in junior high school. Using the electromagnetic law, when there is current in their coils, they will generate corresponding induced magnetic fields, which can be made into conductive coils and eventually form magnetic fields, but they still can't attract iron, but they can play a role in generating electricity. Therefore, although magnetic copper and magnetic aluminum do not exist, copper and aluminum have their own functions, that is, as.

The motors we see in our life here are actually made of copper and aluminum, but this kind of magnetic field is not permanent and needs a constant current to ensure the stability of their magnetic field. Otherwise, once the current becomes smaller, their internal magnetic field will disappear and there will be no magnetism. Therefore, copper and aluminum in nature cannot absorb iron, which is the reason. It has no magnetic substance iron oxide, but it can be used as a material for power generation. The name of the magnet is because it contains ferric oxide, which is magnetic in itself, so fundamentally speaking, there is only a magnet in the world for a reason, and copper and aluminum without magnetism are also caused by the lack of components in their own materials.