Magnets are also surrounded by a similar three-dimensional field. This can be "seen" in two dimensions if iron filings are sprinkled on a sheet of paper placed over the magnet. The filings align ...

The development of neodymium–iron–boron permanent magnets has allowed the miniaturization of motors and hard disk drives, drastically reducing the size of electronics that benefitted from ...

Iron fillings reveal a magnet's magnetic field. You can see a magnet's magnetic field by scattering tiny iron filings around it. The iron filings form a pattern that reveals the lines of the ...