Samarium is a bright silvery white metal and is one of the rare earth metals. Samarium is stable in air at normal temperatures, but ignites in air when the temperature is 150^oC or higher. 

Uses: 
Samarium's main use is in samarium-cobalt alloy magnets in headphones and small motors. These magnets have a high resistance to demagnetization. 

Samarium oxide (samaria) is used as catalyst for the dehydration and dehydrogenation of ethanol. 

Radioactive samarium, ¹⁵³Sm, is used in the treatment of cancers. 

Samarium is also used as an absorber in nuclear reactors.

Samarium  also finds application in ceramic condensers and masers. Masers are devices

or objects that release consistent microwave radiation created by the natural changes

of energy from maximum to minimum of atoms or molecules between energy levels.