Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Rare earth magnets

  1. Jan 31, 2010 #1
    Can someone explain why a rare earth magnet is so much more powerful than the lesser magnet? And why is it called rare earth? Thank you
     
  2. jcsd
  3. Jan 31, 2010 #2

    Andy Resnick

    User Avatar
    Science Advisor
    Education Advisor

    I'm not sure the reason why certain compounds have such high coercivities, but they are called 'rare earth' because the elements (Nd, Sm, Pr, etc) are in the Lanthanide series.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook