SBIR Phase I: Picotesla Magnetic Sensor using MgO-Based Magnetic Tunnel Junction Technology

SBIR 第一阶段：使用基于 MgO 的磁隧道结技术的皮特斯拉磁传感器

• 批准号: 0637819
• 负责人: Xiaoyong Liu
• 金额: $ 10万
• 依托单位: MICRO MAGNETICS INC
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-01-01 至 2007-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0637819&HistoricalAwards=false
• 关键词: SBIR; Phase; Picotesla; Magnetic; Sensor

This Small Business Innovation Research Phase I project will explore the feasibility of developing an ultra-low noise magnetic field sensing technique with picotesla resolution using arrays of MgO-based magnetic tunnel junctions (MTJs). These sensor arrays will be patterned into a fully-active Wheatstone bridge configuration to detect ultra-small magnetic fields. The superior sensitivity of MgO-based MTJ sensors exceeds the performance of existing thin film magnetic sensor technologies by an order of magnitude, allowing the promised performance. If successful, this research will deliver an ultra-sensitive, portable magnetic sensor at a low cost.The creation of mass-produced picotesla-sensitivity magnetic sensors using MgO-based MTJs will have a commercial impact both for existing markets requiring improved performance, such as the automotive and industrial sectors, and for emerging markets, such as those focused on magnetoencephalography (MEG), magneto-cardiography (MCG), and bio-magnetic detection of viruses and bacteria. The increased sensitivity and decreased cost of magnetic sensing components will push the capabilities of these applications.

这个小型企业创新研究第一阶段项目将探索利用氧化镁磁性隧道结(MTJ)阵列开发具有皮秒分辨率的超低噪声磁场传感技术的可行性。这些传感器阵列将被设计成完全有源的惠斯通电桥配置，以检测超小磁场。基于氧化镁的MTJ传感器的卓越灵敏度比现有薄膜磁性传感器技术的性能高出一个数量级，从而实现了承诺的性能。如果成功，这项研究将以低成本提供一种超灵敏、便携的磁传感器。使用基于氧化镁的MTJ创建批量生产的皮特斯拉灵敏度磁传感器将对需要改进性能的现有市场(如汽车和工业部门)和新兴市场(如专注于脑磁图(MEG)、心磁图(MCG)和病毒和细菌的生物磁性检测的市场)产生商业影响。磁传感元件灵敏度的提高和成本的降低将推动这些应用的能力。