The article is nice but the title could be better. I, for one, expected the content to be about Halbach arrays. This is a particular way of arranging magnets t

The article is nice but the title could be better. I, for one, expected the content to be about Halbach arrays. This is a particular way of arranging magnets that increases the magnetic field on one side of the array while decreasing it on the other. It is often used for fridge magnets. https://en.wikipedia.org/wiki/Halbach_array https://en.wikipedia.org/wiki/Halbach_array