Ferroelectricity

Ferroelectricity is a something some materials, usually crystals, do.  Ferroelectricity is when a thing has a positive electric charge on one end and a negative charge on the other end, and these charges can switch places if the thing is placed in an electric field.

 Uses 
People make things that store energy out of ferroelectric materials. 

 References 

Category:Electromagnetism