noun
ferrite magnet
A magnet made from ferrite, a ceramic compound of iron oxide and other metals. Common in speakers, motors, and low-cost magnetic products.
このスピーカーにはフェライト磁石が使われている。
This speaker uses a ferrite magnet.
ネオジム磁石 is a neodymium magnet, which is much stronger than a ferrite magnet but more expensive and less resistant to corrosion.
From English 'ferrite' + 磁石 (magnet). Ferrite refers to a class of ceramic magnetic materials.