Mechanism of double-loop and double-dielectric-peak in antiferroelectrics. Issue 4 (27th December 2019)

• Record Type: Journal Article
• Authors: Cao, Wan Q.; Yue, Yao C.; Qu, Shao H.; Zheng, Ke Y.; Pan, Rui K.; Qi, Ya J.; Zhang, Lei
• Is Part Of: Ferroelectrics. Volume 46:Issue 4/6(2020)
• Page Start: 65
• Page End: 72
• Publication Date: 2019-12-27
• Subjects: antiferroelectrics -- polarizayiont -- dielectric -- coupling effect; Ferroelectricity -- Periodicals; Ferroelectric crystals -- Periodicals; 537
• DOI: 10.1080/07315171.2019.1668680
• Languages: English
• ISSNs: 0731-5171

Abstract

Abstract: Antiferroelectric double loops and double dielectric peaks occurred at an electric field circle synchronously are confirmed theretically by solving the kittel's function with the idea of different responses of dipoles to applied electric field ( E ) in E -direction and anti- E -direction in antiferroelectrics. By solving problem of inversion of dipoles to ferroelectric phase controlled by thermodynamic parameters and the antiferroelectric coupling coefficient in antiferroelectric phase, the numerically simulated results exhibit that antiferroelectric phase can transform to ferroelectric phase with two approaches: decrease in temperature to a critical temperature, and increase in parameter α 0 . The results are well coincident with experimental results.