Materials World Network: Dynamically Controlled Artificial Magnonic Materials Based on Arrays of Nano-Sized Magnetic Dots

这个项目的重点是人造纳米结构磁性系统的基本性质，其中单个纳米尺寸的磁性元素扮演着人造“晶体”的“原子”的角色。通过选择原子的几何参数和磁参数，这些原子之间的相互作用可以被设计成有序的，并且可以通过偏置磁场的脉冲来实时控制系统的磁基态。这一研究将为新型人造动态可控磁性材料在微波信号处理中的应用奠定基础。理论、分析和数值方面的努力旨在建立一幅关于这种材料的静态和动态集体行为的清晰的基本图景。制备和实验的目的是开发具有最佳磁参数的材料，以用于互易和非互易的片上微波信号处理器件。来自奥克兰大学(OU)和阿贡国家实验室(ANL)的美国团队专注于磁性纳米结构(ANL)的理论(分析和数值)(OU)以及制备和表征。来自瓦斯科大学(UPV)的西班牙团队致力于涡旋状态下的磁点理论和所制造的纳米结构静态特性的测量。来自基辅国立大学(KNU)的乌克兰团队专注于微波实验。这项对新型动态控制人造磁铁材料性能的研究，结合了理论、数值模拟和尖端实验技术，预计将产生广泛的影响，从磁性扩展到材料科学和电气工程的其他领域。这项工作将对微波磁性材料领域产生革命性的影响，并将导致一类与现有平面半导体工艺兼容的新型片上信号处理器件的开发。非常重视对美国和欧洲的年轻研究人员的培训，让他们在高度合作和国际化的环境中参与最先进的研究。学生和博士后研究员学习现代理论和实验技术，这些技术为他们在科学和技术领域的成功职业生涯提供了工具，并将使他们在学术界或行业具有很高的就业能力。活动包括扩大学生和高级参与者的小组间访问，以及学术界(OU、UPV和KNU)与国家实验室(ANL)之间的互动。该项目协同结合了理论家、实验学家和制造专家，以快速发展对基于相互作用的磁点阵列的拟议人造磁性材料的基本理解和实际应用。

This project focuses on the fundamental nature of artificial nano-structured magnetic systems, where individual nano-sized magnetic elements play the role of "atoms" of an artificial "crystal". The interaction between these "atoms" can be designed-to-order by choosing the geometrical and magnetic parameters of the "atoms", and the magnetic ground state of the system can be controlled in real time by the pulses of bias magnetic field. The research will lead to the development of novel man-made dynamically controllable magnetic materials for applications in microwave signal processing. Theoretical analytical and numerical efforts are directed towards the creation of a clear fundamental picture of the static and dynamic collective behavior of such materials. The fabrication and experimental efforts are directed towards the development of materials with optimized magnetic parameters that can be used in reciprocal and non-reciprocal on-chip microwave signal processing devices. The US teams from Oakland University (OU) and Argonne National Laboratory (ANL) concentrate on theory (analytical and numerical) (OU) and fabrication and characterization of magnetic nano-structures (ANL). The Spanish team from Universidad del Pais Vasco (UPV) works on the theory of magnetic dots in a vortex state and on the measurements of static characteristics of fabricated nano-structures. The Ukrainian team from Kiev National University (KNU) concentrates on microwave experiments.This research of the properties of novel dynamically controlled artificial magnonic materials, combining theory, numerical simulations and cutting-edge experimental techniques, is expected to have a broad impact that extends beyond magnetism to other fields of materials science and electrical engineering. The work will have a transformative effect on the field of microwave magnetic materials, and will lead to the development of a novel class of on-chip signal processing devices compatible with the existing planar semiconductor technology. Significant emphasis is placed on the training of young researchers in the USA and Europe by engaging them in state-of-the-art research in a highly collaborative and international environment. Students and postdoctoral fellows learn modern theoretical and experimental techniques that provide them with the tools for successful careers in science and technology, and will make them highly employable in either academia or industry. Activities include extended inter-group visits of students and senior participants, and the interaction between academia (OU, UPV, and KNU) and a national laboratory (ANL). The project synergistically combines theorists, experimentalists, and fabrication specialists, as necessary for the rapid development of a fundamental understanding and practical applications of the proposed artificial magnetic materials based on arrays of interacting magnetic dots.