反強誘電体

antiferroelectric material

[目次：結晶等(結晶構造／材料試料)]

結晶中の2つの部分格子が反対方向(反平行)の誘電分極を持ち、それらが打ち消しあうために結晶全体としての自発的な分極がゼロになっている物質。電場中に入れると電場が弱いうちは常誘電体のように電場の向きに分極が現れ、電場が強くなると強誘電体のように電場の向きに非常に強い分極が現れる物質。電場の変化に対してダブルヒステリシスを示す。

An "antiferroelectric material" indicates such a crystal that consists of two sublattices which have anti-parallel dielectric polarizations each other, thus the net polarization of the crystal being 0 (zero). The material is polarized in the direction of an electric field like a paraelectric material when placed in a weak electric field. When the electric field is increased, strong electric polarization is generated in the direction of the electric field like a ferroelectric material. It exhibits a double-hysteresis loop against changes of the electric field.

関連用語から探す