Magnetic substances are substances that can be both attracted and repelled by a magnet.
In reality, only magnets have the property to be attracted and repelled by another magnet. Therefore, all magnetic substances are magnets.
A ferromagnetic substance is a substance that is attracted to a magnet, but which cannot be repelled by it. In addition, ferromagnetic substances do not attract each other.
A key is attracted to a magnet, but it can never be repelled by it. On the other hand, keys don't attract each other.
Ferromagnetic substances are substances made from iron, nickel, cobalt, gadolinium, or an alloy containing one of these metals.
Ever wondered why several paper clips that have come into contact with a strong magnet continue to attract each other once they are away from the magnet? This phenomenon is explained by the fact that some ferromagnetic substances take some time to lose their magnetic property.
Remanence is a phenomenon that occurs when a ferromagnetic substance temporarily retains the properties of the magnet after being subjected to its influence.
In fact, ferromagnetic substances themselves become magnets when in the presence of another magnet. They are, therefore, attracted to the magnet itself.
A non-magnetic substance is a substance that is not influenced by a magnet.
Since most substances around us do not react to a magnet, it can be said that the majority of our environment is non-magnetic.
Several metals, including aluminum and copper, are non-magnetic. It is a common assumption that all metals are attracted to the magnet, but this is not true. Only iron, nickel, cobalt, and gadolinium react to a magnet. All other metals are non-magnetic.
How are magnets made?
Magnets can only be made from three metals, that is iron, nickel, and cobalt. However, some alloys containing at least one of these metals can also function as magnets.
There is another condition that must be met in order to manufacture a magnet, and that is the manufacturing method.
First, the metal is melted before being poured into its mold. Then, the metal is slowly cooled inside a strong magnetic field. Once the magnet has cooled down, it can be removed from the magnetic field.
On the other hand, if the magnet is heated to a high temperature (over |300^{\circ}\ \text {C}|), it loses its magnetic properties and reverts, once again, a normal piece of metal.