The properties of the magnet determine the magnetic force of a magnet. If it is explained by atomic current, the magnetic field generated by the current magnetizes other objects to generate an electric field, and the interaction of the electric fields produces a force. Then there is magnetism.
The matter is mostly composed of molecules, molecules are composed of atoms, and atoms are composed of nuclei and electrons. Inside the atom, electrons are constantly spinning and revolving around the nucleus. Both of these movements of electrons create magnetism. But in the most matters, the electrons move in different directions, and the magnetic effects cancel each other out. Therefore, most magnetic substances do not exhibit magnetism under normal circumstances, and there is no external magnetic force.
Different from other substances such as ferrite, the electron spins in it can be spontaneously arranged in a small range to form a spontaneous magnetization region, which is called a magnetic domain. After the ferromagnetic substance is magnetized, the internal magnetic domains are arranged neatly and in the same direction, which strengthens the magnetism and constitutes a magnet. The magnetization process of the iron block is attracting iron from a magnet. The magnetized iron block and the magnet of different polarities have an attractive force, and the iron block is firmly "sticked" to the magnet. We say that magnets are magnetic, and magnets have a magnetic force.
So that's probably how magnetism is generated.
