Interfacial Electromagnetic Coupling in Multiferroic Tunnel Junctions

多铁性隧道结中的界面电磁耦合

• 批准号: 1207474
• 负责人: Qi Li
• 金额: $ 26万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-06-01 至 2015-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1207474&HistoricalAwards=false
• 关键词: Interfacial; Electromagnetic; Coupling; Multiferroic; Tunnel

This project is jointly funded by the Electronic and Photonic Materials Program (EPM) and Ceramics Program (CER) in the Division of Materials Research (DMR).Technical Description: Multiferroic tunnel junctions, which combine magnetic tunnel junctions with ferroelectric barriers, are potentially multilevel and multifunctional devices with low power consumptions. They have potential to realize electric control of magnetic states, which is critical for functional spintronic devices. This project aims to study the mechanisms of interfacial magnetoelectric coupling effect and the switching of the magnetic state by an electric field in multiferroic tunnel junctions. Interfacial magnetoelectric coupling depends on the atomic and chemical structures of both magnetic and the ferroelectric layers at the interfaces. By combining the design and controlled growth of heterostructures of different magnetic and ferroelectric oxides, measurements of the interfacial magnetic states, and measurements of magnetic and transport properties of the devices, the project seeks to understand the mechanisms of interfacial magnetoelectric interaction in several systems. These studies may lead to enhanced magnetoelectric coupling and new device concepts. Non-technical Description: The project addresses a materials science challenge which has potential impact on next generation of electronic devices. By combining a very thin ferroelectric insulator, a material with spontaneous charge polarization, as the barrier with magnetic tunnel junctions that have been used for magnetic recording and sensors, new functionalities can be achieved. Success of the research can have significant impacts on realizing multilevel multifunctional devices with multiple independent controls. The educational goals of the project are to provide educational and training opportunities for both graduate and undergraduate students, especially for female and underrepresented minority undergraduate students, with a stimulating environment for interdisciplinary experience in physics, materials sciences, and engineering. The PI has many years of experience in advising female and underrepresented groups through several established activities.

该项目由材料研究部（DMR）的电子和光子材料计划（EPM）和陶瓷计划（CER）共同资助。技术描述：将磁性隧道连接连接到铁电障碍与铁电障碍与铁电障碍与低功能消耗的潜在多功能和多功能设备。他们有可能实现对磁状态的电气控制，这对于功能性旋转器件至关重要。该项目旨在研究界面磁电耦合效果的机制，以及通过电场在多型隧道连接中通过电场对磁状态的切换。界面磁电耦合取决于界面处磁性和铁电层的原子和化学结构。通过结合不同磁性和铁电氧化物异质结构的设计和控制生长，界面磁状态的测量以及设备的磁性和传输性能的测量，该项目旨在了解几种系统中种族磁相互作用的机制。这些研究可能导致磁电耦合和新设备概念增强。非技术描述：该项目应对材料科学挑战，该材料科学挑战对下一代电子设备有潜在的影响。 通过将非常薄的铁电绝缘子（一种具有自发电荷极化的材料）结合在一起，因为具有用于磁记录和传感器的磁性隧道连接的屏障，可以实现新的功能。研究的成功可能会对具有多个独立控制的多级多功能设备产生重大影响。该项目的教育目标是为研究生和本科生提供教育和培训机会，尤其是针对女性和代表性不足的少数族裔本科生，并为物理，材料科学和工程学方面的跨学科经验提供了刺激的环境。 PI在通过几项既定活动中为女性和代表性不足的群体提供建议的经验多年。