Following strain-induced mosaicity changes of ferroelectric thin films by ultrafast reciprocal space mapping.
نویسندگان
چکیده
We investigate coherent phonon propagation in a thin film of ferroelectric PbZr(0.2)Ti(0.8)O(3) (PZT) by ultrafast x-ray diffraction experiments, which are analyzed as time-resolved reciprocal space mapping in order to observe the in- and out-of-plane structural dynamics, simultaneously. The mosaic structure of the PZT leads to a coupling of the excited out-of-plane expansion to in-plane lattice dynamics on a picosecond time scale, which is not observed for out-of-plane compression.
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عنوان ژورنال:
- Physical review letters
دوره 110 9 شماره
صفحات -
تاریخ انتشار 2013