How is a Magnetic Field Created? | Physic Review Part 1
The motions of subatomic structures produce a magnetic field. An example of these subatomic structures would be nuclei or electrons. As electrons spin and orbit a nucleus, they produce a magnetic field.
Now, the direction of the spin and orbit indicate the direction of the field. Pairs of electrons that spin and orbit in opposite directions cancel each other out, creating a net magnetic field of zero.
A magnetic moment is the strength of a magnetic field. Materials that have an unpaired electron are what we consider to be magnetic. That brings us to three different types of material.
The first is a paramagnetic material, which has a weak attractive force. Then, a ferromagnetic material, which has a strong attractive force. Then, finally, diamagnetic materials, which have electrons that are paired.
Now, remember a second ago we said that materials that have an unpaired electron are magnetic. Well, here we’re calling this diamagnetic. It has magnetic and the word, yet it has paired electrons.
Diamagnetic materials do not typically have a magnetic moment. They typically do not have a magnetic field. However, there are some dye magnetic materials that have a weak magnetic field.