What are rare earth magnets?
Q: What are rare earth magnets?
A: Rare earth magnets are strong permanent magnets made from alloys of rare earth elements.
Q: When were rare earth magnets developed?
A: Rare earth magnets were developed in the 1970s and '80s.
Q: How strong are rare earth magnets compared to other types of permanent magnets?
A: Rare earth magnets have much stronger magnetic fields than other types such as ferrite or alnico magnets.
Q: What are the two types of rare earth magnets?
A: The two types of rare earth magnets are neodymium magnets and samarium-cobalt magnets.
Q: What are some uses for rare earth magnets?
A: Rare earth magnets have uses in speakers and other applications that require strong magnetic fields.
Q: Why are rare earth magnets usually plated or coated?
A: Rare earth magnets are extremely brittle and vulnerable to corrosion, so they are usually plated or coated to protect them from breaking, chipping, or crumbling into powder.
Q: Are all rare earth magnets magnetostrictive?
A: No, not all rare earth magnets are magnetostrictive. Some, such as Terfenol-D, are magnetostrictive.
