Neodymium magnets, more specifically NdFeB, are a mixture of neodymium, iron and boron. These magnets offer the best ratio in terms of utility and price.
NdFeB magnets have good resistance to external demagnetizing fields due to their high coercivity (resistance to demagnetization). This makes these magnets particularly suitable for electromechanical applications.
They belong to the group of magnets based on rare earths (lanthanides). Their main component is iron with admixtures of neodymium (Nd) and boron (B). Other elements added to the final alloy are mainly cobalt (Co), dysprosium (Dy) - these components serve to improve the magnetic properties (remanence, coercive force) and thermal resistance (maximum working temperature) of the magnets.
Neodymium magnets are hard, brittle and delicate to break. Machining is problematic because it requires breaking the protective galvanic layer. Neodymium can be machined by grinding with diamond tools, but a new protective layer must be formed immediately after machining.
Neodymium magnets are excellent at resisting external demagnetisation and maintain permanent magnetism under normal conditions.
Neodymium magnets are available in various designs and magnetic properties:
Neodymium discs
Neodymium blocks
Neodymium toroids
Neodymium toroids with recessed