Saad Mohamed M, Baxter Paul, McAneney Jonny, Lookman Akeela, Sinnamon Lesley J, Evans Paul, Schilling Alina, Adams Tim, Zhu Xinhua, Pollard Robert J, Bowman Robert M, Gregg J Marty, Jung Dong Jin, Morrison Finlay D, Scott James F
Department of Physics and Astrononmy, Queen's University Belfast, Belfast, BT71NN, UK.
IEEE Trans Ultrason Ferroelectr Freq Control. 2006 Dec;53(12):2208-25. doi: 10.1109/tuffc.2006.168.
A series of experiments has been undertaken to understand more about the fundamental origin of the thickness-induced permittivity collapse often observed in conventional thin film ferroelectric heterostructures. The various experiments are discussed, highlighting the eventual need to examine permittivity collapse in thin film single crystal material. It has been seen that dielectric collapse is not a direct consequence of reduced size, and neither is it a consequence of unavoidable physics associated with the ferroelectric-electrode boundary. Research on three-dimensional shape-constrained ferroelectrics, emphasizing self-assembled structures based on nanoporous alumina templates and on FIB-milled single crystals, is also presented, and appears to represent an exciting area for ongoing research.
为了更深入地了解传统薄膜铁电异质结构中经常观察到的厚度诱导介电常数崩塌的基本起源，已经进行了一系列实验。讨论了各种实验，强调了最终需要研究薄膜单晶材料中的介电常数崩塌。已经发现，介电崩塌不是尺寸减小的直接结果，也不是与铁电-电极边界相关的不可避免的物理现象的结果。还介绍了对三维形状受限铁电体的研究，重点是基于纳米多孔氧化铝模板和聚焦离子束铣削单晶的自组装结构，这似乎代表了一个令人兴奋的正在进行的研究领域。
