Normally, all normal matter is a dipolar - possessing both north and south magnetic poles - and breaking matter down into smaller parts just creates smaller dipoles instead of creating separate north and south poles. Magnetic monopoles are instances of temporary particles that possess only one magnetic pole. There are a variety of ways to create magnetic monopoles, but the most reliable way to contain and manipulate them is through nanotechnology.
Normally, magnetic monopoles behave in isolation, north monopoles 'pushing out' a general magnetic field, and 'south' ones absorbing those in its local environment. By pairing up monopoles of opposite polarity through quantum entanglement, the properties of the two monopoles can be combined into a very narrow, tightly-constrained elecromagnetic field that spans between them. Devices that propogate these fields are called electromagnetic arrays or em-rays. The most common examples of these is found in polyphotonics and some magnetic projectile diversion systems.