出典:Wiktionary
para- + electricity
paraelectricity (uncountable)
出典:Wikipedia
出典:『Wikipedia』 (2011/05/30 15:28 UTC 版)
Paraelectricity is the ability of many materials (specifically ceramic crystals) to become polarized under an applied electric field. Unlike ferroelectricity, this can happen even if there is no permanent electric dipole that exists in the material, and removal of the fields results in the polarization in the material returning to zero. The mechanisms which give rise to paraelectric behaviour are the distortion of individual ions (displacement of the electron cloud from the nucleus) and the polarization of molecules or combinations of ions or defects.