Effect of substrate orientation on the structures and properties of BiFe0.91Zr0.09O3 thin films

Utilizing MgO single crystal substrates with varied orientations (〈100〉, 〈110〉 and 〈111〉), BiFe 0.91 Zr 0.09 O 3 ·(BFZO) films with diverse orientations were synthesized on LaNiO 3 ·(LNO) underlying electrodes employing the sol–gel technique, thereby establishing BFZO/LNO/MgO multilayer film configu...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2024-06, Vol.35 (18), p.1204, Article 1204
Main Authors: Liu, Yuan, Ma, Zhibiao, Jiang, Zhen, He, Jingxian, Sun, Shuhui, Jing, Zhenfeng, Zhang, Fengqing
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Crystal defects
Crystal lattices
Crystal structure
Dielectric properties
Electric properties
Epitaxial growth
Integrated circuits
Leakage current
Magnesium oxide
Materials Science
Multilayers
Optical and Electronic Materials
Orientation effects
Photoelectrons
Single crystals
Sol-gel processes
Substrates
Thin films
X ray photoelectron spectroscopy
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Summary:Utilizing MgO single crystal substrates with varied orientations (〈100〉, 〈110〉 and 〈111〉), BiFe 0.91 Zr 0.09 O 3 ·(BFZO) films with diverse orientations were synthesized on LaNiO 3 ·(LNO) underlying electrodes employing the sol–gel technique, thereby establishing BFZO/LNO/MgO multilayer film configurations. This research comprehensively examines the impact of orientation on the crystal lattice, microstructure, defect density, and electrical characteristics of BFZO films. The outcomes reveal that the fabricated films demonstrate favorable epitaxial growth relationships and compact surface morphologies. X-ray photoelectron spectroscopy (XPS) analysis demonstrates that the films oriented along the  〈111〉 direction exhibit the least amount of Fe 2+ and oxygen vacancy defects. Moreover, these films show the highest remanent polarization (2 P r  = 85.31 μC/cm 2 ), the lowest leakage current density, and exceptional resistance to aging. These findings suggest that the orientation of the films plays a crucial role in influencing their structural and electrical characteristics, thereby holding significant implications for enhancing the fabrication of functional films.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-024-13003-7