Self-Regulated Chemical Substitution in a Highly-Strained Perovskite Oxide

You, Lu1; Wang, Xin1,2; Zhang, Qinghua3; Chi, Xiao4; Yang, Ping4; Hu, Yiqi1; Li, Ping1; Hui, Qiang1; Fang, Liang1; Gu, Lin3; Xu, Bin1,2; Wang, Junling5

2022-03-01

10.1002/adfm.202112463

ADVANCED FUNCTIONAL MATERIALS   影响因子和分区

1616-301X

1616-3028

Deterministic control of substitution sites is the holy grail of chemical engineering in materials science. The substitution of the dopants in the host crystal lattice usually obeys the empirical Hume-Rothery rules, in which the mismatch of atomic size must be small and thus site-specific. Herein, we report an unconventional case of mixed-site substitution in highly-strained BiFeO3 thin films. Driven by the delicate balance between chemical strain and epitaxial strain energies, the solid-solution system demonstrates a self-regulation behavior in dopant site occupancy to minimize the total free energy. This proposed mechanism offers valuable insight into the chemical substitution pathway in epitaxial thin films and provides a potential route to selectively control the substitution sites.

chemical substitution epitaxial strain ferroelectrics morphotropic phase boundary perovskite

SCI ; EI

英语

NI期刊

通讯

National Natural Science Foundation of China[12074164,11774249,12074278,52025025,52072400] ; Natural Science Foundation of the Jiangsu Higher Education Institution of China["18KJA140004","20KJA140001"] ; Natural Science Foundation of Jiangsu Province[BK20201404] ; Guangdong Provincial Key Laboratory Program[2021B1212040001]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000770001100001

WILEY-V C H VERLAG GMBH

20221211803249

Bismuth compounds ; Free energy ; Iron compounds ; Lattice mismatch ; Thin films

Minerals:482.2 ; Thermodynamics:641.1 ; Crystal Lattice:933.1.1

MATERIALS SCIENCE

Web of Science

1.Soochow Univ, Jiangsu Key Lab Thin Films, Sch Phys Sci & Technol, Suzhou 215006, Peoples R China
2.Soochow Univ, Inst Theoret & Appl Phys, Suzhou 215006, Peoples R China
3.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China
4.Natl Univ Singapore, Singapore Synchrotron Light Source, 5 Res Link, Singapore 117603, Singapore
5.Southern Univ Sci & Technol, Guangdong Prov Key Lab Funct Oxide Mat & Devices, Dept Phys, Shenzhen 518055, Guangdong, Peoples R China

You, Lu,Wang, Xin,Zhang, Qinghua,et al. Self-Regulated Chemical Substitution in a Highly-Strained Perovskite Oxide[J]. ADVANCED FUNCTIONAL MATERIALS,2022,32.

You, Lu.,Wang, Xin.,Zhang, Qinghua.,Chi, Xiao.,Yang, Ping.,...&Wang, Junling.(2022).Self-Regulated Chemical Substitution in a Highly-Strained Perovskite Oxide.ADVANCED FUNCTIONAL MATERIALS,32.

You, Lu,et al."Self-Regulated Chemical Substitution in a Highly-Strained Perovskite Oxide".ADVANCED FUNCTIONAL MATERIALS 32(2022).