Structure dependence of ferroelectricity in high quality BiMnO3 epitaxial films

Nan Yang; Ye Yuan; Zhao Guan; Ni Zhong; Wen Xia Chen; Rui Juan Qi; Yuan Yuan Zhang; Rong Huang; Xiao Dong Tang; Ping Hua Xiang; Chun Gang Duan; Jun Hao Chu

doi:10.1103/PhysRevMaterials.3.054402

Structure dependence of ferroelectricity in high quality BiMnO₃ epitaxial films

Nan Yang, Ye Yuan, Zhao Guan, Ni Zhong, Wen Xia Chen, Rui Juan Qi, Yuan Yuan Zhang, Rong Huang, Xiao Dong Tang, Ping Hua Xiang, Chun Gang Duan, Jun Hao Chu

School of Physics and Electronic Science

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

Epitaxial BiMnO₃ (BMO) thin films were prepared on (001)-oriented SrTiO₃ substrates with a SrRuO₃ buffer layer using pulsed laser deposition. The correlation between ferroelectric and structural properties of BMO has been investigated in detail. By high-resolution transmission electron microscopy measurement, we observed a structural transition from pseudocubic to monoclinic structure with increasing thickness of BMO films, which can be ascribed to the intermediate layer and small composition fluctuation, i.e., Bi deficiency. The ferroelectricity of the BMO films has been characterized by piezoresponse force microscope, demonstrating that pseudocubic BMO thin films show intrinsic ferroelectricity, while the ferroelectricity is absent or very weak in the monoclinic BMO thin films at room temperature. The results of density-functional theory calculations also support the experimental results.

Original language	English
Article number	054402
Journal	Physical Review Materials
Volume	3
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevMaterials.3.054402
State	Published - 10 May 2019

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10.1103/PhysRevMaterials.3.054402

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title = "Structure dependence of ferroelectricity in high quality BiMnO3 epitaxial films",

abstract = "Epitaxial BiMnO3 (BMO) thin films were prepared on (001)-oriented SrTiO3 substrates with a SrRuO3 buffer layer using pulsed laser deposition. The correlation between ferroelectric and structural properties of BMO has been investigated in detail. By high-resolution transmission electron microscopy measurement, we observed a structural transition from pseudocubic to monoclinic structure with increasing thickness of BMO films, which can be ascribed to the intermediate layer and small composition fluctuation, i.e., Bi deficiency. The ferroelectricity of the BMO films has been characterized by piezoresponse force microscope, demonstrating that pseudocubic BMO thin films show intrinsic ferroelectricity, while the ferroelectricity is absent or very weak in the monoclinic BMO thin films at room temperature. The results of density-functional theory calculations also support the experimental results.",

author = "Nan Yang and Ye Yuan and Zhao Guan and Ni Zhong and Chen, \{Wen Xia\} and Qi, \{Rui Juan\} and Zhang, \{Yuan Yuan\} and Rong Huang and Tang, \{Xiao Dong\} and Xiang, \{Ping Hua\} and Duan, \{Chun Gang\} and Chu, \{Jun Hao\}",

note = "Publisher Copyright: {\textcopyright} 2019 American Physical Society.",

year = "2019",

month = may,

day = "10",

doi = "10.1103/PhysRevMaterials.3.054402",

language = "英语",

volume = "3",

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TY - JOUR

T1 - Structure dependence of ferroelectricity in high quality BiMnO3 epitaxial films

AU - Yang, Nan

AU - Yuan, Ye

AU - Guan, Zhao

AU - Zhong, Ni

AU - Chen, Wen Xia

AU - Qi, Rui Juan

AU - Zhang, Yuan Yuan

AU - Huang, Rong

AU - Tang, Xiao Dong

AU - Xiang, Ping Hua

AU - Duan, Chun Gang

AU - Chu, Jun Hao

PY - 2019/5/10

Y1 - 2019/5/10

N2 - Epitaxial BiMnO3 (BMO) thin films were prepared on (001)-oriented SrTiO3 substrates with a SrRuO3 buffer layer using pulsed laser deposition. The correlation between ferroelectric and structural properties of BMO has been investigated in detail. By high-resolution transmission electron microscopy measurement, we observed a structural transition from pseudocubic to monoclinic structure with increasing thickness of BMO films, which can be ascribed to the intermediate layer and small composition fluctuation, i.e., Bi deficiency. The ferroelectricity of the BMO films has been characterized by piezoresponse force microscope, demonstrating that pseudocubic BMO thin films show intrinsic ferroelectricity, while the ferroelectricity is absent or very weak in the monoclinic BMO thin films at room temperature. The results of density-functional theory calculations also support the experimental results.

AB - Epitaxial BiMnO3 (BMO) thin films were prepared on (001)-oriented SrTiO3 substrates with a SrRuO3 buffer layer using pulsed laser deposition. The correlation between ferroelectric and structural properties of BMO has been investigated in detail. By high-resolution transmission electron microscopy measurement, we observed a structural transition from pseudocubic to monoclinic structure with increasing thickness of BMO films, which can be ascribed to the intermediate layer and small composition fluctuation, i.e., Bi deficiency. The ferroelectricity of the BMO films has been characterized by piezoresponse force microscope, demonstrating that pseudocubic BMO thin films show intrinsic ferroelectricity, while the ferroelectricity is absent or very weak in the monoclinic BMO thin films at room temperature. The results of density-functional theory calculations also support the experimental results.

UR - https://www.scopus.com/pages/publications/85065979756

U2 - 10.1103/PhysRevMaterials.3.054402

DO - 10.1103/PhysRevMaterials.3.054402

M3 - 文章

AN - SCOPUS:85065979756

SN - 2475-9953

VL - 3

JO - Physical Review Materials

JF - Physical Review Materials

IS - 5

M1 - 054402

ER -

Structure dependence of ferroelectricity in high quality BiMnO₃ epitaxial films

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