New Directions for Organic Spintronics: Organic-Based Magnetic Heterostructures and Microwave Magnetodynamics

有机自旋电子学的新方向：有机基磁性异质结构和微波磁动力学

• 批准号: 1507775
• 负责人: Ezekiel Johnston-Halperin
• 金额: $ 39.99万
• 依托单位: Ohio State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-06-01 至 2018-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1507775&HistoricalAwards=false
• 关键词: New; Directions; Organic; Spintronics; Based

Nontechnical Description: The push towards "ubiquitous computing," the inclusion of small-scale and low-power computing devices in everyday objects ranging from appliances, to clothing, to packaging, has emerged as a new driver that is pushing information technology off the desktop (or the laptop) and into every aspect of our world. The study of organic electronics is playing a major role in this new paradigm due to the mechanical flexibility, low cost, and ease of manufacturing enabled by these materials. Early signs of the success of this approach can be found in the commercial development of flexible display technologies based on organic light-emitting diodes and organic thin film transistors. However, this new technology is currently limited by the lack of non-volatile organic memory elements, i.e. the ability for a device to remember what it has been doing once the power is turned off. This project focuses on addressing this gap through the development of organic-based magnetic materials and the devices enabled by them. It is focused on developing the new materials, new devices, and new fundamental understanding necessary to translate the potential of these organic-based magnets into a realistic complement to the optical and electronic functionality already demonstrated for organic electronics. In addition, this project serves as training ground for the next generation of young researchers that will drive this evolving technical revolution. Recent graduates of the PI's group have moved on to positions at Samsung, Intel and science policy institutes, and current training has been integrated with Ohio State University's Masters to PhD Bridge Program to enhance the diversity of our future STEM workforce. In its first two years of operation this Bridge Program has already increased the students from underrepresented minorities in the Department of Physics by 400%.Technical Description: This project extends the boundaries of organic electronics to include magnetic and spintronic functionality. This effort exploits recent scientific and technical breakthroughs to explore the growth of all-organic magnetic heterostructures and investigate the dynamic excitation of organic-based magnetic materials in two independent but correlated thrusts. In Thrust 1, work focuses on determining the structure-function relationship between the growth of organic-based magnets and their static and microwave-frequency magnetic properties. This work includes the growth of ferromagnet/non-magnetic bilayers, ferromagnet/non-magnet/ferromagnet heterostructures, and corrugated films with shape-induced in-plane magnetic anisotropy. Thrust 2 focuses on exploring dynamic excitations of these systems, including the investigation of electrically detected ferromagnetic resonance, ferromagnetic resonance driven spin pumping detected both via ferromagnetic resonance linewidth changes and inverse spin-Hall effect generated voltages, and spin-transfer torque based on the spin-Hall effect in high spin-orbit metals for ferromagnet/metal bilayers. Taken together, these two Thrusts are laying the foundation for a new conception of microwave-frequency organic spintronics and magnetoelectronics.

非技术描述：向“无处不在的计算”推动，将小规模和低功率计算设备包括在日常物品中，从设备，服装到包装，已成为一个新驱动程序，它正在将信息技术推向台式机（或笔记本电脑）以及我们世界各个方面。由于这些材料的机械灵活性，低成本和易于制造的制造，对有机电子产品的研究在这种新范式中发挥了重要作用。这种方法成功的早期迹象可以在基于有机发光二极管和有机薄膜晶体管的柔性显示技术的商业开发中找到。但是，这项新技术目前受到缺乏非挥发性有机内存元素的限制，即设备一旦关闭功率就可以记住它所做的事情的能力。该项目致力于通过开发有机的磁性材料和启用的设备来解决这一差距。它的重点是开发新材料，新设备和新的基本理解，将这些基于有机的磁铁的潜力转化为现实的补充到已经证明的有机电子产品的光学和电子功能。此外，该项目是下一代年轻研究人员的培训理由，这些研究人员将推动这场不断发展的技术革命。 PI小组的近期毕业生已继续担任三星，英特尔和科学政策研究所的职位，目前的培训已与俄亥俄州立大学的硕士学位纳入博士学位桥梁计划，以提高我们未来的STEM劳动力的多样性。在运营的头两年中，该桥梁计划已经将物理学部代表性不足的少数群体的学生增加了400％。技术描述：该项目扩展了有机电子设备的边界，以包括磁性和旋转功能。这项工作利用了最近的科学和技术突破来探索全有机磁异质结构的生长，并研究了两个独立但相关的推力中有机磁性材料的动态激发。在推力1中，工作着重于确定有机磁体的生长与其静态和微波频率磁性特性之间的结构功能关系。这项工作包括铁磁/非磁性双层，铁磁性/非磁铁/非马格网络异质结构以及具有形状诱导的平面磁各向异性的瓦楞膜。推力2的重点是探索这些系统的动态激发，包括对电磁磁性共振的研究，通过铁磁共振旋转泵驱动的旋转泵的研究，基于旋转的旋转效率/旋转金属效应。综上所述，这两个推力为微波频率有机旋转和磁性电子学的新概念奠定了基础。