why HDDs use Neodymium magnets instead of other magnets?

Question

why HDDs use Neodymium magnets instead of other magnets?

In: 0

Answer 1

Neodymium, or specifically an alloy of Neodymium, Iron and Boron is the material with the highest magnetic field per volume.

So if you use that you can build a smaller HDD with the same properties.