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What does a magnetic field look like?

We're often asked about what the shape of a magnetic field looks like, and how it is changed by it's surrounding environment. Below are a few screenshots taken from a magnetic FEA (Finite Element Analysis) software analysis. For these pictures, our popular D42 magnet is shown throughout.
1.A D42 magnet in free space
2.A D42 magnet touching a flat steel plate (Case 1)
3.A D42 magnet between two flat steel plates (Case 2)
4.A pair of D42 magnets (Case 3)
5.A pair of D42 magnets attracting, animated
6.A pair of D42 magnets repelling, animated


A D42 magnet in free space:


A D42 magnet touching a flat steel plate (Case 1):


A D42 magnet between two flat steel plates (Case 2):


A pair of D42 magnets (Case 3):


A pair of D42 magnets attracting, animated:


A pair of D42 magnets repelling, animated:


May
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DDH1
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DEX2
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K&J Magnetics, Inc.
Your online source for incredibly powerful neodymium magnets