Ferroelectric Switching

铁电开关

• 批准号: EP/F038259/1
• 负责人: Michael Reece
• 金额: $ 10.14万
• 依托单位: Queen Mary University of London
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2008
• 资助国家: 英国
• 起止时间: 2008 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FF038259%2F1
• 关键词: Ferroelectric; Switching

Ferroelectric materials are used in ceramic, thin film and single crystal form for actuator, sensor and memory applications. Their properties are intrinsically dependent on ferroelectric switching by the movement of domain walls. Despite the importance of ferroelectric switching, there is no complete theory to describe it, and the atomistic nature of the switching process is still unknown. In this work we will develop a rigorous formulism of Rate Theory to describe ferroelectric switching. This will then allow us this to analyse experimental polarisation switching data for ferroelectric ceramics to obtain the activation parameters (volume and enthalpy) for the rate controlling step in the switching process. The proposed research provides a new approach to modelling ferroelectric switching that will, importantly, provide a physical insight into the processes involved. The results of this work can potentially be applied in other fields, including ferroelectric polymers and geology.

铁电材料被用于陶瓷、薄膜和单晶形式的致动器、传感器和存储器应用。它们的性质本质上依赖于由磁区壁运动引起的铁电开关。尽管铁电开关很重要，但目前还没有完整的理论来描述它，而且开关过程的原子化性质仍然是未知的。在这项工作中，我们将发展一个严格的速率理论公式来描述铁电开关。这将使我们能够分析铁电陶瓷的实验极化切换数据，以获得切换过程中速率控制步骤的激活参数(体积和热焓)。这项拟议的研究提供了一种模拟铁电开关的新方法，重要的是，它将提供对所涉及过程的物理洞察。这项工作的结果可能会应用于其他领域，包括铁电聚合物和地质学。

项目成果

Role of internal field and exhaustion in ferroelectric switching

• DOI: 10.1063/1.4856235
• 发表时间: 2014-01
• 期刊: Journal of Applied Physics
• 影响因子: 3.2
• 作者: G. Viola;K. Chong;F. Guiu;M. Reece