铁电性
材料科学
偶极子
极地的
纳米尺度
静电力显微镜
凝聚态物理
压电响应力显微镜
极化(电化学)
外延
不对称
显微镜
化学物理
原子力显微镜
光电子学
纳米技术
光学
电介质
图层(电子)
化学
物理化学
天文
有机化学
物理
量子力学
作者
Moumita Dutta,Ying Ding,Jianghua Chen,Chonglin Chen,A. S. Bhalla,Ruyan Guo
标识
DOI:10.1016/j.scriptamat.2016.11.031
摘要
Nanoscale ferroelectric behaviour has been investigated in epitaxial BaZrO3 thin films grown in an oxygen deficient environment. Though centrosymmetric in nature, prominent ferroelectric polar states were observed via Piezo Force Microscopy (PFM), with polarization switching achieved when oppositely poled. Absence of intrinsic polar directions annul the conventional root causes for ferroelectricity like structural asymmetry and strain, rather attributes the nanoscale polar orders observed, to defect dipoles originated from oxygen vacancies introduced during the film growth. Electrostatic Force Microscopy (EFM) exhibiting inhomogeneous distribution of surface potential confirms the accumulation of oxygen vacancies contributing towards the measured polarizations.
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