90-degree polarization switching in BaTiO3 crystals without domain wall motion

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Abstract

We report 90° polarization switching in a BaTiO3 crystal without domain wall (DW) motion by prefabricating samples with interlocking domains via compression. During electric re-poling of the depoled and aged crystals, 90° domain nucleation still exists, but 90° DW motion is inhibited by the strong constraints from surrounding domains, leading to DW-free 90° polarization switching. The measured coercive field of 500 V/mm for the DW-free 90° switching is close to the intrinsic values and much larger than that of 80 V/mm via 90° DW motion. Compared to the rather difficult domain-free 180° polarization switching in ultrathin films, 90° DW-free switching is easier. © 2013 AIP Publishing LLC.

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Li, Y. W., Scott, J. F., Fang, D. N., & Li, F. X. (2013). 90-degree polarization switching in BaTiO3 crystals without domain wall motion. Applied Physics Letters, 103(23). https://doi.org/10.1063/1.4832784

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