Ferroelastic-switching-driven large shear strain and piezoelectricity in a hybrid ferroelectric

Hu, Yuzhong1,2; You, Lu3; Xu, Bin3; Li, Tao2; Morris, Samuel Alexander4; Li, Yongxin5; Zhang, Yehui3; Wang, Xin3; Lee, Pooi See2; Fan, Hong Jin1; Wang, Junling2,6

2021

10.1038/s41563-020-00875-3

NATURE MATERIALS   影响因子和分区

1476-1122

1476-4660

["Materials that can produce large controllable strains are widely used in shape memory devices, actuators and sensors(1,2), and great efforts have been made to improve the strain output(3-6). Among them, ferroelastic transitions underpin giant reversible strains in electrically driven ferroelectrics or piezoelectrics and thermally or magnetically driven shape memory alloys(7,8). However, large-strain ferroelastic switching in conventional ferroelectrics is very challenging, while magnetic and thermal controls are not desirable for practical applications. Here we demonstrate a large shear strain of up to 21.5% in a hybrid ferroelectric, C6H5N(CH3)(3)CdCl3, which is two orders of magnitude greater than that in conventional ferroelectric polymers and oxides. It is achieved by inorganic bond switching and facilitated by structural confinement of the large organic moieties, which prevents undesired 180 degrees polarization switching. Furthermore, Br substitution can soften the bonds, allowing a sizable shear piezoelectric coefficient (d(35) approximate to 4,830 pm V-1) at the Br-rich end of the solid solution, C6H5N(CH3)(3)CdBr3xCl3(1-x). The electromechanical properties of these compounds suggest their potential in lightweight and high-energy-density devices, and the strategy described here could inspire the development of next-generation piezoelectrics and electroactive materials based on hybrid ferroelectrics.","Reversible strains are widely used in high-technology systems, with piezoelectrics showing fast response but low strain. Here, ferroelectric C6H5N(CH3)(3)CdCl3 is shown to produce a strain of 21.5%, two orders of magnitude larger than other piezoelectrics, due to organic molecules preventing 180 degrees polarization switching."]

SCI ; EI

英语

NI期刊

通讯

National Natural Science Foundation of China[12074278,12074277] ; Key University Science Research Project of Jiangsu Province[20KJA140001] ; Natural Science Foundation of Jiangsu Province[BK20201404] ; AME Individual Research Grant[A1883c0004] ; Ministry of Education, Singapore (AcRF Tier 1)["118/17","189/18"]

Chemistry ; Materials Science ; Physics

Chemistry, Physical ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000607023400006

NATURE RESEARCH

20211910321430

Crystallography ; Electromechanical devices ; Ferroelectric materials ; Ferroelectricity ; Hybrid materials ; Piezoelectricity ; Shape-memory alloy ; Switching

Electricity: Basic Concepts and Phenomena:701.1 ; Dielectric Materials:708.1 ; Mechanics:931.1 ; Crystalline Solids:933.1

MATERIALS SCIENCE

Web of Science

1.Nanyang Technol Univ, Sch Phys & Math Sci, Singapore, Singapore
2.Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore, Singapore
3.Soochow Univ, Sch Phys Sci & Technol, Jiangsu Key Lab Thin Films, Suzhou, Peoples R China
4.Nanyang Technol Univ, Facil Anal Characterisat Testing & Simulat FACTS, Singapore, Singapore
5.Nanyang Technol Univ, Sch Phys & Math Sci, Div Chem & Biol Chem, Singapore, Singapore
6.Southern Univ Sci & Technol, Dept Phys, Shenzhen, Peoples R China

Hu, Yuzhong,You, Lu,Xu, Bin,et al. Ferroelastic-switching-driven large shear strain and piezoelectricity in a hybrid ferroelectric[J]. NATURE MATERIALS,2021,20:612-617.

Hu, Yuzhong.,You, Lu.,Xu, Bin.,Li, Tao.,Morris, Samuel Alexander.,...&Wang, Junling.(2021).Ferroelastic-switching-driven large shear strain and piezoelectricity in a hybrid ferroelectric.NATURE MATERIALS,20,612-617.

Hu, Yuzhong,et al."Ferroelastic-switching-driven large shear strain and piezoelectricity in a hybrid ferroelectric".NATURE MATERIALS 20(2021):612-617.