Ferroelectric Polarization Rotation in Order–Disorder-Type LiNbO3 Thin Films
AuthorsYoo, Tae Sup
Lee, Sang A
Jeong, Hu Young
Mohamed, Ahmed Yousef
Jo, Ji Young
Choi, Woo Seok
KAUST DepartmentLaboratory of Nano Oxides for Sustainable Energy
Material Science and Engineering Program
Physical Science and Engineering (PSE) Division
Online Publication Date2018-11-08
Print Publication Date2018-12-05
Permanent link to this recordhttp://hdl.handle.net/10754/630198
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AbstractThe direction of ferroelectric polarization is prescribed by the symmetry of the crystal structure. Therefore, rotation of the polarization direction is largely limited, despite the opportunity it offers in understanding important dielectric phenomena such as piezoelectric response near the morphotropic phase boundaries and practical applications such as ferroelectric memory. In this study, we report the observation of continuous rotation of ferroelectric polarization in order-disorder-type LiNbO3 thin films. The spontaneous polarization could be tilted from an out-of-plane to an in-plane direction in the thin film by controlling the Li vacancy concentration within the hexagonal lattice framework. Partial inclusion of monoclinic-like phase is attributed to the breaking of macroscopic inversion symmetry along different directions and the emergence of ferroelectric polarization along the in-plane direction.
CitationYoo TS, Lee SA, Roh C, Kang S, Seol D, et al. (2018) Ferroelectric Polarization Rotation in Order–Disorder-Type LiNbO3 Thin Films. ACS Applied Materials & Interfaces 10: 41471–41478. Available: http://dx.doi.org/10.1021/acsami.8b12900.
SponsorsWe thank J. Lee for insightful discussion. This work was supported by Basic Science Research Programs through the National Research Foundation of Korea (NRF) (NRF-2017R1A2B4011083, NRF-2016R1A6A3A11934867 (S.A.L.), NRF-2015R1A5A1009962 (C.R. and J.L.), NRF-2014R1A4A1008474 (S.K., D.S., and Y.K.), NRF-2018R1D1A1B07045663 (J.K. and S.P.), NRF-2015R1C1A1A02037514 (D.-Y.C.), NRF-2016R1D1A1A02937051 (J.Y.J.), and NRF-2015M3D1A1070672 (Y.M.K.). Y.M.K. was also supported by the Institute for Basic Science (IBS-R011-D1)).
PublisherAmerican Chemical Society (ACS)