Investigating the effects of reduced size on the properties of ferroelectrics.
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.
Saad
Mohamed M
MM
Department of Physics and Astrononmy, Queen's University Belfast, Belfast, BT71NN, UK.
Baxter
Paul
P
McAneney
Jonny
J
Lookman
Akeela
A
Sinnamon
Lesley J
LJ
Evans
Paul
P
Schilling
Alina
A
Adams
Tim
T
Zhu
Xinhua
X
Pollard
Robert J
RJ
Bowman
Robert M
RM
Gregg
J Marty
JM
Jung
Dong Jin
DJ
Morrison
Finlay D
FD
Scott
James F
JF
D003198:Computer Simulation; D017097:Electric Impedance; D004563:Electrochemistry / Q000295:instrumentation / Q000379:methods*; D004574:Electromagnetic Fields; D008422:Materials Testing; D008956:Models, Chemical; D049329:Nanostructures / Q000737:chemistry* / Q000528:radiation effects / Q000648:ultrastructure*; D010316:Particle Size