Ferroelectric memory elements which contain a poly α-amino acid which is a copolymer containing a glutamic acid-γ-ester unit represented by the formula (I), defined herein, and a glutamic acid-γ-ester unit represented by the formula (II), defined herein, in a molar ratio of units of formula (I) to units of formula (II) of 10/90-90/10 are useful as recording elements such as RFID and the like.
含有聚
α-氨基酸的
铁电存储元件,该聚合物是一种共聚物,其中包含由式(I)所表示的谷
氨酸-γ-酯单元和由式(II)所表示的谷
氨酸-γ-酯单元,式(I)和式(II)的单元摩尔比为10/90-90/10。此类元件可用作RFID等记录元素。