Samarium is a chemical element with symbol Sm and atomic number 62.



  • Samarium’s main use is in samarium-cobalt alloy magnets for headphones, small motors and pickups for some electric guitars. These magnets have a high resistance to demagnetization. They keep their ferromagnetism at temperatures up to 700 oC.  As a result of their ability to operate at high temperatures, SmCo magnets are used in precision-guided weapons.
  • Samarium oxide (samaria) is used as a catalyst for the dehydration and dehydrogenation of ethanol. Samarium oxide is also used in infrared absorbing glass.
  • Radioactive 153Sm is used in the treatment of cancers.
  • Samarium is also used as an absorber in nuclear reactors


  • The radioactive isotope samarium-153 is the major component of the drug samarium (153Sm) lexidronam (Quadramet), which kills cancer cells in the treatment of lung cancer, prostate cancer, breast cancer and osteosarcoma.


  • Samarium is considered to be moderately toxic.



Other names

Sm 62


Source: Wikipedia,


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