Large enhancement of ferroelectric properties of perovskite oxides via nitrogen incorporation
Perovskite oxides have a wide variety of physical properties that make them promising candidates for versatile technological applications including nonvolatile memory and logic devices. Chemical tuning of those properties has been achieved, to the greatest extent, by cation-site substitution, while anion substitution is much less explored due to the difficulty in synthesizing high-quality, mixed-anion compounds. Here, nitrogen-incorporated BaTiO<sub>3</sub> thin films have been synthesized by reactive pulsed-laser deposition in a nitrogen growth atmosphere. The enhanced hybridization between titanium and nitrogen induces a large ferroelectric polarization of 70 μC/cm<sup>2</sup> and high Curie temperature of ~1213 K, which are ~2.8 times larger and ~810 K higher than in bulk BaTiO<sub>3</sub>, respectively. These results suggest great potential for anion-substituted perovskite oxides in producing emergent functionalities and device applications.
Authors
- Sankalpa Hazra (ORCID: https://orcid.org/0000-0002-9126-8058)
- Kelvin H. L. Zhang (ORCID: https://orcid.org/0000-0001-9352-6236)
- Chang‐Yang Kuo (ORCID: https://orcid.org/0000-0003-1968-8020)
- C. F. Chang (ORCID: https://orcid.org/0000-0003-1803-2468)
- Venkatraman Gopalan (ORCID: https://orcid.org/0000-0001-6866-3677)
- Yun‐Long Tang (ORCID: https://orcid.org/0000-0001-6555-3296)
- Sujit Das (ORCID: https://orcid.org/0000-0001-9823-0207)
- Yin‐Lian Zhu (ORCID: https://orcid.org/0000-0002-0356-3306)
- Lane W. Martin (ORCID: https://orcid.org/0000-0003-1889-2513)
- Feng‐Hui Gong (ORCID: https://orcid.org/0000-0002-0853-0992)
- Zuhuang Chen (ORCID: https://orcid.org/0000-0003-1912-6490)
- L. Bellaïche (ORCID: https://orcid.org/0000-0002-6181-2024)
- Xian‐Kui Wei (ORCID: https://orcid.org/0000-0003-4320-1120)
- Xingjun Liu (ORCID: https://orcid.org/0000-0002-3015-8525)
- Bin Xu (ORCID: https://orcid.org/0000-0002-0107-0727)
- Xue Ma (ORCID: https://orcid.org/0000-0001-9417-2601)
- Suguru Yoshida (ORCID: https://orcid.org/0000-0002-1016-5031)
- Shuai Wang (ORCID: https://orcid.org/0000-0002-7593-8816)
- Lang Chen (ORCID: https://orcid.org/0000-0002-8762-892X)
- Zhenni Yang (ORCID: https://orcid.org/0009-0006-1459-6361)
- Tao Wang
- Yu‐Chieh Ku
- Pan Shen (ORCID: https://orcid.org/0009-0004-7346-2553)
Institutions
- Pennsylvania State University (US)
- Lawrence Berkeley National Laboratory (US)
- National Yang Ming Chiao Tung University (TW)
- Tel Aviv University (IL)
- Xiamen University (CN)
- Chinese Academy of Sciences (CN)
- Harbin Institute of Technology (CN)
- Southern University of Science and Technology (CN)
- Soochow University (CN)
- National Synchrotron Radiation Research Center (TW)
- Max Planck Institute for Chemical Physics of Solids (DE)
- Indian Institute of Science Bangalore (IN)
- University of Arkansas at Fayetteville (US)
- University of California, Berkeley (US)
Publication Details
- Journal
- Science Advances
- Published
- 2025-01-10
- DOI
- https://doi.org/10.1126/sciadv.ads8830
- Citations
- 18
- Primary Topic
- Ferroelectric and Piezoelectric Materials
- Type
- article
- Field-Weighted Citation Impact
- 9.32
Funders
- U.S. Department of Defense
- U.S. Department of Energy
- Indian Institute of Science
- National Natural Science Foundation of China
- Xiamen University
- Southern University of Science and Technology
- Science and Engineering Research Board
- Fundamental Research Funds for the Central Universities