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

该项目侧重于人工纳米结构磁性系统的基本性质，其中单个纳米级磁性元素扮演人工“晶体”的“原子”角色。通过选择“原子”的几何参数和磁性参数，可以按顺序设计这些“原子”之间的相互作用，并且可以通过偏置磁场脉冲实时控制系统的磁基态。该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提供指导。理论、分析和数值努力的目的是为这些材料的静态和动态集体行为创造一个清晰的基本图景。制造和实验工作的方向是开发具有优化磁参数的材料，可用于互反和非互反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）的美国团队专注于理论（分析和数值）（OU）和磁性纳米结构（ANL）的制造和表征。来自西班牙佩斯瓦斯科大学（UPV）的研究小组致力于涡旋状态下磁点的理论和人造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。本研究结合理论、数值模拟和尖端实验技术，对新型动态控制人工磁材料的特性进行研究，预计将产生广泛的影响，从磁学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，并将导致与现有平面半导体技术兼容的新型片上信号处理设备的发展。重点放在培训美国和欧洲的年轻研究人员，让他们在高度合作和国际环境中从事最先进的研究。学生和博士后学习现代理论和实验技术，为他们提供在科学和技术领域取得成功的工具，并将使他们在学术界或工业界高度就业。活动包括扩展学生和高年级参与者的小组间访问，以及学术界（开放大学，UPV和KNU）和国家实验室（ANL）之间的互动。该项目协同结合了理论家、实验家和制造专家，这对于基于相互作用磁点阵列的人工磁性材料的基本理解和实际应用的快速发展是必要的。

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.