四川师范大学学报（自然科学版）2011，Vol.34Issue(5)：684-689,6.DOI:10.3969/j.issn.1001-8395.2011.05.018
两表面层铁电薄膜体介质层效应理论研究
On the Theory of the Effect of the Thick Dielectric Film Layers to Ferroelectric Thin Films with Two Surface Layers
摘要
Abstract
With the help of the mean-field approximation under the transverse Ising model, the influence of the thick dielectric film layers on the phase transition properties of the ferroelectric thin films with two surface layers was studied. By treating with the model, a recursive equation for the phase transition properties of the ferroelectric thin film with two surface layers and thick dielectric film lay-ers was obtained. The effects of the exchange interaction and the transverse field of the thick dielectric film layer to the phase diagrams were studied as well. Additionally, the influence of the exchange interaction to the crossover value of the transverse field, and the influ-ence of the transverse field on the crossover value of the exchange interaction were also investigated. The results show that the ferroelec-tric range, the Curie temperature, and the transverse field of the thick dielectric layers all become large, with the exchange interaction of the thick dielectric layers increase. And the exchange interaction of the thick dielectric layers also become large when its transverse field increases, while the ferroelectric range, the Curie temperature become small with the increasing of the transverse field of the thick dielectric layers. Meanwhile, it is also found that the influence of the exchange interaction of the thick dielectric layers on the whole film is larger than its transverse field. At last, the effect of the exchange interaction of the two surface layers on the phase diagram is al-so shown. The numerical results will be helpful to the fabrication of the thick dielectric ferroelectric film.关键词
铁电薄膜/相图/体介质层/两表面层Key words
ferroelectric thin films/ phase diagram/ thick dielectric films/ two surface layers分类
社会科学引用本文复制引用
王春栋,滕保华,程登木,周飞..两表面层铁电薄膜体介质层效应理论研究[J].四川师范大学学报（自然科学版）,2011,34(5):684-689,6.基金项目
国家自然科学基金(50975137)和教育部留学回国人员科研启动基金(20071108)资助项目 （50975137）
