Permanent Magnets Described by Magnetic Surface Currents - Comments

In summary, Charles Link has submitted a new PF Insights post discussing the explanation of permanent magnets using magnetic surface currents. This method is mathematically equivalent to the traditional "pole method" for computing magnetic fields, but provides a better understanding of the underlying physics. However, some have questioned whether surface currents are a real phenomenon or just a model to match field geometry. The use of small, closed current loops to model atomic magnetic moments is outdated and there are no confirmed ferromagnetic surface currents. The difference between ferromagnets and paramagnets is also a topic of debate in quantum magnetism. Ultimately, the origin of permanent magnets lies in the determination of the magnetic moment configuration in the lowest energy state, rather than the existence of surface
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  • #37
I'm just now adding this thread to the discussion for the sake of completeness, and see particularly post 73 by @vanhees71 , and even a good part of the later portion of the thread, where the merits and lack of merit of the magnetic surface current model are discussed in much detail, as well as the complete thread, where other details about magnetostatic and electromagnetic concepts are discussed :
https://www.physicsforums.com/threa...electric-induction.962632/page-4#post-6110191
 
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