Tracking intrinsic ferroelectric switching under electric field via operando second harmonic generation

Dong, Yangda1,2; Tan, Yangchun1; Zhang, Yuan2,3,4; Dai, Liyufen1; Yuan, Guangtong2; Ren, Chuanlai2; Liu, Zhenghao2; Zhong, Xiangli1; Li, Changjian2; Wang, Jinbin1; Zhong, Gaokuo3; Li, Jiangyu2,3

2024-03-11

10.1063/5.0185783

APPLIED PHYSICS LETTERS   影响因子和分区

0003-6951

1077-3118

Polarization hysteresis is the defining characteristic of ferroelectrics, though the measurement of ferroelectric hysteresis is often complicated by artifacts such as leakage current and not all materials with apparent electrical hysteresis are ferroelectric. In this Letter, we have set up an operando second harmonic generation (SHG) system to track intrinsic ferroelectric switches under electric field, which is free from leakage current interference, thus yielding a signature for intrinsic ferroelectricity. Taking representative PbZr0.2Ti0.8O3 (PZT) thin films with different thicknesses as examples, the operando SHG system can capture ferroelectric hysteresis not only for PZT films thicker than 50 nm, for which conventional hysteresis measurement works, but also for PZT film as thin as 26 nm, for which conventional measurement fails due to the presence of large leakage current. Different domain evolution processes in these films are also illustrated.

SCI ; EI

英语

通讯

National Key Research and Development Program of China["2022YFF0706101","2021YFA0715600"] ; National Natural Science Foundation of China["52103289","92066102","12192213","92066203","51872251","12275230","12027813"] ; Guangdong Provincial Key Laboratory Program from the Department of Science and Technology of Guangdong Province[2021B1212040001] ; Shenzhen Science and Technology Program["RCBS20221008093246071","RCBS20210609103201007","JCYJ20200109115219157","RCYX20200714114733204"] ; Guangdong Basic and Applied Basic Research Foundation[2022A1515012434]

Physics

Physics, Applied

WOS:001182140700023

AIP Publishing

PHYSICS

Web of Science

1.Xiangtan Univ, Sch Mat Sci & Engn, Natl Prov Lab Special Funct Thin Film Mat, Xiangtan 411105, Hunan, Peoples R China
2.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
3.Shenzhen Inst Adv Technol, Chinese Acad Sci, Shenzhen 518055, Guangdong, Peoples R China
4.Southern Univ Sci & Technol, Guangdong Prov Key Lab Funct Oxide Mat & Devices, Shenzhen 518055, Guangdong, Peoples R China

Dong, Yangda,Tan, Yangchun,Zhang, Yuan,et al. Tracking intrinsic ferroelectric switching under electric field via operando second harmonic generation[J]. APPLIED PHYSICS LETTERS,2024,124(11).

Dong, Yangda.,Tan, Yangchun.,Zhang, Yuan.,Dai, Liyufen.,Yuan, Guangtong.,...&Li, Jiangyu.(2024).Tracking intrinsic ferroelectric switching under electric field via operando second harmonic generation.APPLIED PHYSICS LETTERS,124(11).

Dong, Yangda,et al."Tracking intrinsic ferroelectric switching under electric field via operando second harmonic generation".APPLIED PHYSICS LETTERS 124.11(2024).