Investigating the effects of reduced size on the properties of ferroelectrics |
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Authors: | 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 |
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Affiliation: | Department of Physics and Astrononmy, Queen's University Belfast, Belfast, BT71NN, UK. |
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Abstract: | 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. |
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