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.

Answer 2

because they are stronger for the same size, this means that a larger force is generated by so the read write head move faster and it improves random access speed