Magnets in free space can be modeled using the surface charge model . This model assumes that a magnet can be represented as a layer of positive charges on the top surface of the magnet and a layer of negative charges on the bottom of the magnet. In case of cuboidal magnets this results in analytical field and force ,  equations.
|Title of host publication||Proceedings of the IEEE International Magnetics Conference, Intermag 2015, 11 - 15 May 2015, Beijing, China|
|Place of Publication||Piscataway|
|Publisher||Institute of Electrical and Electronics Engineers|
|Publication status||Published - 2015|