A Highly Strained Phase in PbZr0.2Ti0.8O3 Films with Enhanced Ferroelectric Properties

Huang, Chuanwei1; Liao, Zhaolong1; Li, Mingqiang2,3; Guan, Changxin1,4,5; Jin, Fei1; Ye, Mao4; Zeng, Xierong1; Zhang, Tianjin5; Chen, Zuhuang6; Qi, Yajun5; Gao, Peng2,3; Chen, Lang4

2021-02-01

10.1002/advs.202003582

ADVANCED SCIENCE   影响因子和分区

2198-3844

Although epitaxial strain imparted by lattice mismatch between a film and the underlying substrate has led to distinct structures and emergent functionalities, the discrete lattice parameters of limited substrates, combined with strain relaxations driven by film thickness, result in severe obstructions to subtly regulate electro-elastic coupling properties in perovskite ferroelectric films. Here a practical and universal method to achieve highly strained phases with large tetragonal distortions in Pb-based ferroelectric films through synergetic effects of moderately (approximate to 1.0%) misfit strains and laser fluences during pulsed laser deposition process is demonstrated. The phase possesses unexpectedly large Poisson's ratio and negative thermal expansion, and concomitant enhancements of spontaneous polarization (approximate to 100 mu C cm(-2)) and Curie temperature (approximate to 800 degrees C), 40% and 75% larger than that of bulk counterparts, respectively. This strategy efficiently circumvents the long-standing issue of limited numbers of discrete substrates and enables continuous regulations of exploitable lattice states in functional oxide films with tightly elastic coupled performances beyond their present levels.

Curie temperature epitaxial ferroelectric films highly strained tetragonal phase negative thermal expansion

SCI ; EI

英语

通讯

Natural Science Foundation of SZU[827000198] ; Guangdong Basic and Applied Basic Research Foundation[2019A1515011529] ; National Natural Science Foundation of China[51972160] ; Science and Technology Research Items of Shenzhen[JCYJ20180504165650580] ; Sustech High-level Special Funding["G02206303","G02206403"] ; Natural Science Foundation of China[11974104]

Chemistry ; Science & Technology - Other Topics ; Materials Science

Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000619171900001

WILEY

20210809953100

Ferroelectric films ; Ferroelectricity ; Lattice mismatch ; Lead compounds ; Negative thermal expansion ; Perovskite ; Pulsed laser deposition ; Pulsed lasers ; Strain ; Substrates ; Thermal expansion ; Zirconium compounds

Minerals:482.2 ; Electricity: Basic Concepts and Phenomena:701.1 ; Dielectric Materials:708.1 ; Lasers, General:744.1 ; Laser Applications:744.9 ; Crystal Lattice:933.1.1 ; Materials Science:951

Web of Science

1.Shenzhen Univ, Coll Mat Sci & Engn, Shenzhen Key Lab Special Funct Mat, Shenzhen 518060, Peoples R China
2.Peking Univ, Sch Phys, Electron Microscopy Lab, Beijing 100871, Peoples R China
3.Peking Univ, Sch Phys, Int Ctr Quantum Mat, Beijing 100871, Peoples R China
4.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Guangdong, Peoples R China
5.Hubei Univ, Dept Mat Sci & Engn, Wuhan 430062, Peoples R China
6.Harbin Inst Technol, Sch Mat Sci & Engn, Shenzhen 518055, Peoples R China

Huang, Chuanwei,Liao, Zhaolong,Li, Mingqiang,et al. A Highly Strained Phase in PbZr0.2Ti0.8O3 Films with Enhanced Ferroelectric Properties[J]. ADVANCED SCIENCE,2021,8.

Huang, Chuanwei.,Liao, Zhaolong.,Li, Mingqiang.,Guan, Changxin.,Jin, Fei.,...&Chen, Lang.(2021).A Highly Strained Phase in PbZr0.2Ti0.8O3 Films with Enhanced Ferroelectric Properties.ADVANCED SCIENCE,8.

Huang, Chuanwei,et al."A Highly Strained Phase in PbZr0.2Ti0.8O3 Films with Enhanced Ferroelectric Properties".ADVANCED SCIENCE 8(2021).