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나노 구조 물리 연구단
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Ferroelectric Polarization Rotation in Order-Disorder-Type LiNbO3 Thin Films

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Title
Ferroelectric Polarization Rotation in Order-Disorder-Type LiNbO3 Thin Films
Author(s)
Tae Sup Yoo; Sang A Lee; Changjae Roh; Seunghun Kang; Daehee Seol; Xinwei Guan; Jong-Seong Bae; Jiwoong Kim; Young-Min Kim; Hu Young Jeong; Seunggyo Jeong; Ahmed Yousef Mohamed; Deok-Yong Cho; Ji Young Jo; Sungkyun Park; Tom Wu; Yunseok Kim; Jongseok Lee; Woo Seok Choi
Publication Date
2018-12
Journal
ACS APPLIED MATERIALS & INTERFACES, v.10, no.48, pp.41471 - 41478
Publisher
AMER CHEMICAL SOC
Abstract
The 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. © 2018 American Chemical Society
URI
https://pr.ibs.re.kr/handle/8788114/5909
ISSN
1944-8244
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
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