DataVXACS Applied Materials & InterfacesPaper
journal article·2026-03-04

Phase-Selective Growth of Ferroelectric and Antiferroelectric NaNbO 3 Thin Films

Baichen Lin, Qibin Zeng, Ping Yang, Shengwei Zeng, Zhi Shiuh Lim, Tiancheng Luo, Weifan Cai, Samantha Faye Duran Solco, Zhen Ye, Celine Sim, Jinlong Xu, Mengyao Xiao, Khuong Phuong Ong, Chee Kiang Ivan Tan, Seeram Ramakrishna, Mark B. H. Breese, Chengkuo Lee, Kaiyang Zeng, Yeng Ming Lam, Huajun Liu

ACS Applied Materials & Interfaces· Volume 18· Issue 8
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Source abstract

Abstract

Ferroelectric and antiferroelectric materials play a critical role in electrical, optical, and thermal devices due to their electric field-controlled polarization switching capability. Controlling phase formation during thin film growth is essential for the design of these devices. In this study, we separately stabilized pure ferroelectric rhombohedral (N phase) and pure antiferroelectric orthorhombic (P phase) structures by precisely controlling the growth conditions of 70 nm-thick NaNbO 3 (NNO) thin films on (111)-oriented Nb-doped SrTiO 3 substrates. Through reciprocal space mappings and quarter-order diffraction measurements, a twinning structure within the NNO P-phase film is resolved. An antiferroelectric-to-ferroelectric phase transition, accompanied by a substantial enhancement in the electromechanical coupling response, is observed in the NNO P-phase film. Importantly, a phase diagram is constructed to delineate the growth window for each phase. This work provides a framework for synthesizing NNO thin films with controlled phases and offers a strategy for designing functional ferroelectric and antiferroelectric devices.
Source: openalex_inverted_index · Quality: baseline

Research context

Electronic materials

OpenAlex topics: Ferroelectric and Piezoelectric Materials · Photorefractive and Nonlinear Optics · Electronic and Structural Properties of Oxides

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis #08-03, Singapore 138634, Republic of Singapore

School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Republic of Singapore

Singapore Synchrotron Light Source (SSLS), National University of Singapore, 5 Research Link, Singapore 117603, Republic of Singapore

Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117575, Republic of Singapore

Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117583, Republic of Singapore

Institute of High Performance Computing (IHPC), A*STAR (Agency for Science, Technology and Research), 1 Fusionopolis Way, #16-16 Connexis, Singapore 138632, Republic of Singapore

Facility for Analysis, Characterisation, Testing and Simulation (FACTS), Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Republic of Singapore

Funding

Agency for Science, Technology and Research · National Research Foundation Singapore

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