CAREER: Reliable and Fault Tolerant Super Energy Efficient Nanomagnetic Computing in the Presence of Thermal Noise

职业：存在热噪声时可靠且容错的超能效纳米磁计算

• 批准号: 1253370
• 负责人: Jayasimha Atulasimha
• 金额: $ 43.68万
• 依托单位: Virginia Commonwealth University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-07-01 至 2020-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1253370&HistoricalAwards=false
• 关键词: CAREER; Reliable; Fault; Tolerant; Super

Nanomagnetic logic and memory have emerged as powerful alternatives to conventional transistor based circuits because a multiferroic nanomagnet, switched with electrically generated strain ("straintronics"), is a far more energy-efficient switch than a transistor. However, nanomagnetic logic is extremely error-prone at room temperature since thermal fluctuations can seriously disrupt magnetization dynamics during switching. In order to make nanomagnetic logic viable, the issue of high error rate must be addressed and a solution found to mitigate its deleterious effects. This project pursues an approach for reducing error rates without calling for impractical on-chip error-correction resources. This research could enable processors to be built with superbly energy-efficient technology that can lead to implantable smart medical devices, button-sized face recognition systems, structural health monitoring systems, and consumer applications such as wearable electronics. A graduate course on nanoscale magnetism with an emphasis on nanomagnetic computing will be created. With the support of the Richmond Area Program for Minorities in Engineering, minority high school students will be hosted in the Principle Investigator's lab every summer. The Principle Investigator will develop innovative hands-on workshops to explain nanomagnetic memory and logic to K-12 students from selected schools that have low representations in Virginia science fairs and will also transfer this knowledge and expertise to teachers from these schools. Science fair participation from such schools will be analyzed to study the impact of this 5-year innovative outreach effort in K-12 teaching.

纳米磁性逻辑和存储器已成为传统晶体管电路的强大替代品，因为通过电产生的应变（“应变电子学”）进行开关的多铁性纳米磁体是一种比晶体管更加节能的开关。然而，纳米磁性逻辑在室温下极易出错，因为热波动会严重扰乱切换过程中的磁化动态。为了使纳米磁性逻辑可行，必须解决高错误率的问题，并找到减轻其有害影响的解决方案。该项目寻求一种降低错误率的方法，而不需要不切实际的片上纠错资源。这项研究可以使处理器能够采用极其节能的技术来构建，从而产生可植入的智能医疗设备、按钮大小的面部识别系统、结构健康监测系统以及可穿戴电子产品等消费应用。将创建纳米级磁性研究生课程，重点是纳米磁性计算。在里士满地区工程少数族裔计划的支持下，每年夏天都会在原理研究员实验室接待少数族裔高中生。首席研究员将举办创新的实践研讨会，向来自弗吉尼亚科学博览会中代表性较低的选定学校的 K-12 学生解释纳米磁存储器和逻辑，并将这些知识和专业知识传授给这些学校的教师。我们将对这些学校的科学博览会参与情况进行分析，以研究这项为期 5 年的创新推广工作对 K-12 教学的影响。

项目成果

Creation and annihilation of non-volatile fixed magnetic skyrmions using voltage control of magnetic anisotropy

利用磁各向异性电压控制非易失性固定磁斯格明子的产生和湮灭

• DOI: 10.1038/s41928-020-0432-x
• 发表时间: 2020-06-29
• 期刊: Nature Electronics
• 影响因子: 34.3
• 作者: Dhritiman Bhattacharya;S. A. Razavi;Hao Wu;Bingqian Dai;Kang L. Wang;J. Atulasimha
• 通讯作者: J. Atulasimha