Ultrafast switching of ferroelastic nanodomains in bilayered ferroelectric thin films

作者：Ehara Y^*; Yasui S; Nagata J; Kan D; Anbusathaiah V; Yamada T; Sakata O; Funakubo H; Nagarajan V

来源：Applied Physics Letters, 2011, 99(18): 182906.

DOI：10.1063/1.3657468

The dynamic switching of ferroelastic nanodomains in ferroelectric PbZr0.3Ti0.7O3/PbZr0.7Ti0.3O3 bilayers was investigated. Synchrotron microdiffraction using a high-speed pulse generator reveals that electric field pulses as short as 200 ns can switch the ferroelastic domain. Multiples of random distribution analysis of the field-induced changes in diffraction peak intensities finds a dynamic strain change from 0.2 to 1% with increasing the pulse width. Raman spectroscopy shows considerable decreases in A(1)(1TO) soft mode intensity after applications of short pulses, confirming the ferroelastic switching. The results demonstrate that ferroelastic domains can indeed move at time scales of the order of hundreds of nanoseconds.

• 出版日期2011-10-31