Polarization reversal behavior in the Pt/Pb(Zr,Ti)O3/Pt and Pt/Al2O3/Pb(Zr,Ti)O3/Pt capacitors for different reversal directions

Hyun Ju Lee; Gun Hwan Kim; Min Hyuk Park; An-Quan Jiang; Cheol Seong Hwang
May 2010
Applied Physics Letters;5/24/2010, Vol. 96 Issue 21, p212902
Academic Journal
The polarization reversal behavior of Pt/Pb(Zr,Ti)O3/Pt and Pt/Al2O3/Pb(Zr,Ti)O3/Pt capacitors was examined according to the reversal direction using transient switching current measurements. The changes in switching resistance according to the polarization reversal direction suggests that during reversal from the upward to downward polarization, nucleation of a reversed domain occurs at the top interface, whereas nucleation occurs at the bottom interface in the opposite case. The extremely high activation energy for the nucleation of a reversed domain can be reduced considerably by electron injection from the by-electrode but not by hole injection.


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