scholarly journals Persistence and memory of polar nanoregions in a ferroelectric relaxor under an electric field

2005 ◽  
Vol 72 (21) ◽  
Author(s):  
Guangyong Xu ◽  
P. M. Gehring ◽  
G. Shirane
Keyword(s):  
Electric Field ◽  
Ferroelectric Relaxor ◽  
Polar Nanoregions

Functional oxide films with engineered ferroelectric properties

2013 ◽  
Vol 1507 ◽  
Author(s):  
R. Wördenweber ◽  
T. Ehlig ◽  
J. Schubert ◽  
R. Kutzner ◽  
E. Hollmann
Keyword(s):  
Electric Field ◽  
Room Temperature ◽  
Dipole Moments ◽  
Ferroelectric Properties ◽  
Field Direction ◽  
Complex Dielectric Constant ◽  
Electric Field Direction ◽  
Relaxation Experiments ◽  
Polar Nanoregions ◽  
The Given

ABSTRACTThe ferroelectric properties of anisotropically strained SrTiO3 films are analyzed by detailed measurements of the complex dielectric constant as function of temperature, frequency, bias voltage and electric field direction. The strain induces a relaxor-ferroelectric phase that persists up to room temperature. However, transition temperature and ferroelectric properties strongly depend on the orientation of the electric field and therefore on the amount of structural strain in the given electric field direction. Frequency and time dependent relaxation experiments reveal the presence and properties of polar nanoregions with randomly distributed directions of dipole moments in the film.

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