We don’t know if the electron actually spins. The resolution of our instruments is not sufficient to determine the electron’s structure, or its rotation. The electron is a single particle, as far as we know. The electron’s behavior can be described only as if it were spinning. This degree of freedom is simply called “spin” for lack of a better term.
Any electrically charged object that rotates around an axis generates a magnetic force. A spinning, electrically charged sphere can generate a magnetic field.
Where is the magnetic moment created by the rotational charge? And what is the distance from center of the sphere? You can measure the magnetic field of a stationary electronic electron to determine its form.
Where (the Bohr magneton
() is the magnet moment of an electron and (-) is its distance from it. The magnetic field of an electron is the same as that of a rotating, electrically charged sphere.
The total angular moment in a system can be considered a conserved quantity. However, this is only true if you include the spin of any particles. We often associate rotation with angular momentum, so it makes sense that the spins of particles must be generated from rotating objects.
This degree of freedom we call “spin” actually resembles rotations dynamically. We call this “spin” because of the resemblance. It could be that there is some physical rotation, or it could just be an oddity in nature.