SGER: Enhanced Magnetoelectric Behavior in Piezoelectric/Magnetostrictive Composites via Magnetic Field-Assisted Processing

SGER：通过磁场辅助处理增强压电/磁致伸缩复合材料的磁电行为

• 批准号: 0909460
• 负责人: Nazanin Bassiri-Gharb
• 金额: --
• 依托单位: Georgia Tech Research Corporation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-06-01 至 2011-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0909460&HistoricalAwards=false
• 关键词: SGER; Enhanced; Magnetoelectric; Behavior; Piezoelectric

The research objective of this Small Grant for Exploratory Research (SGER) award is to understand the effect of applied magnetic field during the thermal processing of thin films. Specifically, the impact of magnetic field-assisted processing on piezoelectric/magnetostrictive (PZT/Terfenol-D) thin film composites will be explored. PZT and Terfenol-D are highly anisotropic materials and therefore significant property enhancement in each material is expected from enhanced texturing. The observed magnetoelectric effect in the composite system is due to strain coupling at the interface. Thus, the thin film texturing independent of the substrate obtained here will allow an arbitrarily large number of layers to be deposited. More layers will result in more interfaces, leading to an even greater enhancement of the composite properties. Furthermore, the selected processing routes are scalable to industrial manufacturing. Deliverables include a deeper understanding of the role of magnetism in materials processing and new processing paths for functional single phase and composite multiferroics. This research will also offer a multidisciplinary research experience for two graduate research assistants in engineering.If successful, the results of this research will demonstrate heteroepitaxy-like properties via a low-cost, high speed manufacturing process. This will result in compact, cost-effective devices that are capable of accomplishing sophisticated magnetoelectric tasks. Example applications include high sensitivity, portable, magnetic field sensors (for example in healthcare applications such as brain activity monitoring), terrestrial magnetic field energy harvesters, etc. Devices made possible by the research will offer the advantages of planar fabrication, a flat initial state, and monolithic composition. The results will be disseminated to allow the creation of such commercial devices. Graduate engineering students will benefit through involvement in multidisciplinary research.

这项探索性研究（SGER）奖的研究目标是了解薄膜热处理过程中施加磁场的影响。具体而言，磁场辅助处理对压电/磁致伸缩（PZT/Terfenol-D）薄膜复合材料的影响将进行探索。PZT和Terfenol-D是高度各向异性的材料，因此预期每种材料的显著性能增强来自增强的织构化。在复合系统中观察到的磁电效应是由于在界面处的应变耦合。因此，独立于此处获得的基板的薄膜纹理化将允许沉积任意大数目的层。更多的层将导致更多的界面，从而导致复合材料性能的更大增强。此外，所选择的加工路线可扩展到工业制造。可供选择的内容包括更深入地了解磁性在材料加工中的作用，以及功能性单相和复合多铁性材料的新加工途径。这项研究还将为两名工程学研究生助理提供多学科的研究经验。如果成功，这项研究的结果将通过低成本，高速制造工艺展示异质外延性质。这将产生能够完成复杂磁电任务的紧凑、具有成本效益的设备。示例应用包括高灵敏度、便携式磁场传感器（例如，在大脑活动监测等医疗保健应用中）、地磁场能量收集器等。通过研究实现的设备将提供平面制造、平坦初始状态和单片结构的优势。研究结果将予以传播，以便创造这种商业装置。研究生工程专业的学生将通过参与多学科研究受益。