TY - JOUR
KW - Nucleation
KW - Electricity
KW - Spectroscopy
KW - Microscopy
KW - Geometry
KW - Polarization
KW - Nanostructures
KW - Ferroelectricity
KW - Article
KW - Priority journal
KW - Heterojunctions
KW - Ferroelectric switching
KW - Nanomaterial
KW - Ferroelectric
KW - Multiferroic nanostructures
KW - Signal generators
KW - Switching systems
KW - Spatially resolved mapping
KW - Switching spectroscopy piezoresponse force microscopy
KW - Parameter
KW - Signal detection
AU - B.J Rodriguez
AU - S Jesse
AU - A.P Baddorf
AU - T Zhao
AU - Y.H Chu
AU - Ramamoorthy Ramesh
AU - E.A Eliseev
AU - A.N Morozovska
AU - S.V Kalinin
AB - Local ferroelectric polarization switching in multiferroic BiFeO 3-CoFe2O4 nanostructures is studied using switching spectroscopy piezoresponse force microscopy (SS-PFM). Dynamic parameters such as the work of switching are found to vary gradually with distance from the heterostructure interfaces, while nucleation and coercive biases are uniform within the ferroelectric phase. We demonstrate that the electrostatic and elastic fields at interfaces do not affect switching and nucleation behavior. Rather, the observed evolution of switching properties is a geometric effect of the heterointerface on the signal generation volume in PFM. This implies that the heterostructures can be successfully used in devices, since interfaces do not act as preferential sites for switching. At the same time, small systematic variations of switching properties within the ferroelectric component can be ascribed to the long-range elastic and electrostatic fields in the heterostructure, which can be visualized in 2D. © IOP Publishing Ltd.
BT - Nanotechnology
DO - 10.1088/0957-4484/18/40/405701
LA - eng
M1 - 40
N1 - cited By 43
N2 - Local ferroelectric polarization switching in multiferroic BiFeO 3-CoFe2O4 nanostructures is studied using switching spectroscopy piezoresponse force microscopy (SS-PFM). Dynamic parameters such as the work of switching are found to vary gradually with distance from the heterostructure interfaces, while nucleation and coercive biases are uniform within the ferroelectric phase. We demonstrate that the electrostatic and elastic fields at interfaces do not affect switching and nucleation behavior. Rather, the observed evolution of switching properties is a geometric effect of the heterointerface on the signal generation volume in PFM. This implies that the heterostructures can be successfully used in devices, since interfaces do not act as preferential sites for switching. At the same time, small systematic variations of switching properties within the ferroelectric component can be ascribed to the long-range elastic and electrostatic fields in the heterostructure, which can be visualized in 2D. © IOP Publishing Ltd.
PY - 2007
T2 - Nanotechnology
TI - Spatially resolved mapping of ferroelectric switching behavior in self-assembled multiferroic nanostructures: Strain, size, and interface effects
VL - 18
SN - 09574484
ER -