Variation of contact resonance frequency during domain switching in PFM measurements for ferroelectric materials

作     者：Yue Liu Yao Sun Wanheng Lu Hongli Wang Zhongting Wang Bingxue Yu Tao Li Kaiyang Zeng 

作者机构：Department of Mechanical EngineeringNational University of Singapore9 Engineering Drive 1117576Singapore Center for Spintronics and Quantum SystemState Key Laboratory for Mechanical Behavior of MaterialsSchool of Materials Science and EngineeringXi’an Jiaotong UniversityShanxi 710049Xi’anChina 

出 版 物：《Journal of Materiomics》 (无机材料学学报（英文）)

年 卷 期：2020年第6卷第1期

页      面：109-118页

核心收录：

学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 0817[工学-化学工程与技术] 0806[工学-冶金工程] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：the financial support by Ministry of Education,Singapore,through National University of Singapore(NUS)under the Academic Research Fund(ARF)of grant number R-265-000-596-112 the post-graduate scholarship provide by NUS the support for post-doctoral research fellow from ARF of R-265-000-596-112 by Ministry of Education,Singapore 

主　　题：Ferroelectricity Piezoresponse force spectroscopy Contact resonance frequency Dual AC resonance tracking Domain switching Damping harmonic oscillator model 

摘      要：Piezoresponse Force Spectroscopy(PFS)is a powerful technique widely used for measuring the nanoscale electromechanical coupling of the ferro-/piezo-electric ***,it is found that certain nonferroelectric materials can also generate the“hysteresis-loop-likeresponses from the PFS measurements due to many other factors such as electrostatic *** work therefore studies the signal of the contact resonance frequency during the PFS *** comparing the results from ferroelectric and non-ferroelectric materials,it is found there are distinct differences between these two types of materials in the variation of the contact resonance frequency during the PFS measurements.A momentary and sharp increase of the contact resonance frequency occurs when the domain is switched by applying the DC bias,which can be regarded as a unique characteristic for the ferroelectric *** analyzing the reliability and mechanism of this method,it is proposed that the contact resonance frequency variation at the coercive bias is capable to differentiate the electromechanical responses of the ferroelectric and non-ferroelectric materials during the PFS measurements.