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http://dx.doi.org/10.3938/NPSM.68.1249

Quantitative Approach to the Magnetic Force of a Cylindrical Permanent Magnet Acting on a Ferromagnetic Object  

Hyun, Donggeul (Department of Science Education, Teachers' College, Jeju National University)
Shin, Aekyung (Department of Science Education, Teachers' College, Jeju National University)
Publication Information
New Physics: Sae Mulli / v.68, no.11, 2018 , pp. 1249-1261 More about this Journal
Abstract
The quantitative representation for the magnetic force of a cylindrical permanent magnet acting on a ferromagnetic cylindrical object was derived on the basis of magnetization theories, and the Gilbert and Ampere models of magnetism. The magnetic force derived in this study is directly proportional to the remanent magnetization magnetic field, the cross-sectional area of the permanent magnet, the saturation magnetic field, and the cross-sectional area of the ferromagnetic object and is inversely proportional to the square of the quantity related to the distance between the permanent magnet and the ferromagnetic object. The magnetic forces of an AlNiCoV cylindrical permanent magnet and a Ferrite cylindrical permanent magnet, both with a radius of 0.4 cm and a length of 7 cm, acting on ferromagnetic objects at distances farther than the radius were calculated to be less than 3.6711 N and 0.1857 N, respectively.
Keywords
Magnetic force; Permanent magnet; Ferromagnetic object; AlNiCoV cylindrical magnet; Ferrite cylindrical magnet;
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