Polarization switching and fatigue in Pb(Zr0.52Ti0.48)O3 films sandwiched by oxide electrodes with different carrier types.

Authors :: Chen, Feng
Liu, Q. Z.
Wang, H. F.
Zhang, F. H.
Wu, Wenbin
Source :: Applied Physics Letters; 5/7/2007, Vol. 90 Issue 19, p192907, 3p, 5 Graphs
Publication Year :: 2007
Abstract: By using highly conductive p-type La<subscript>0.7</subscript>Sr<subscript>0.3</subscript>MnO<subscript>3</subscript> (LSMO) and n-type La<subscript>0.07</subscript>Sr<subscript>0.93</subscript>SnO<subscript>3</subscript> (LSSO) as electrodes, all-oxide Pb(Zr<subscript>0.52</subscript>Ti<subscript>0.48</subscript>)O<subscript>3</subscript> (PZT) capacitors, LSMO/PZT/LSMO, LSSO/PZT/LSSO, LSSO/PZT/LSMO, and LSMO/PZT/LSSO, have been grown epitaxially on (001)SrTiO<subscript>3</subscript> substrates, and their structure, switching, fatigue, and optical properties were investigated. Strikingly, contrary to the LSMO/PZT/LSMO capacitors, those having the n-type electrode show poor fatigue resistance especially at lower driving frequencies, which was further confirmed by using another n-type oxide electrode, SrTi<subscript>0.9</subscript>Sb<subscript>0.1</subscript>O<subscript>3</subscript>. The results suggest that with a depletion layer at the PZT/LSSO interface, charge accumulation and injection during switching may be responsible for the fatigue. [ABSTRACT FROM AUTHOR]

Subjects :: OXIDE electrodes
LEAD oxides
THIN films
TITANATES
EPITAXY
POLARIZATION (Electricity)

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