Electromagnetic properties of ferromagnetic micro and nanowires for magnonics

磁子学用铁磁微米线和纳米线的电磁特性

• 批准号: RGPIN-2015-04530
• 负责人: Ménard, David
• 金额: $ 2.55万
• 依托单位: École Polytechnique de Montréal
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=685490
• 关键词: Electromagnetic; properties; ferromagnetic; micro; nanowires

Excitations in periodic magnetic nanostructures can be used for information transport and processing. This new and rapidly emerging research field is called magnonics. My research program aims to design, develop and characterize such artificially nanostructured magnetic materials, to tailor their electromagnetic properties. This proposal is mainly concerned with arrays of ferromagnetic nanowires electroplated in nanoporous alumina membranes. The focus is on the microwave range of the spectrum. By combining metallic and ferromagnetic nanoinclusions in a dielectric template, we can exploit various charge and spin transport phenomena, along with spin and charge density waves, to achieve magnetic and dielectric responses not found in nature. This could lead to the development of new devices able to transport and process information at the nanoscale. The funds requested are essentially for the financial support of 2 PhD students. The specific objectives are: (1) to understand the dissipation mechanisms limiting practical applications in such materials; (2) to determine the nature of collective magnetic modes excited in FMNW arrays; (3) to investigate the effect of the intra-wire excitations on the collective excitations of the arrays; (4) to investigate whether the parametric amplification of spinwaves could actively compensate the losses of specific modes. Outcomes of the work include new tailorable microwave materials and new design possibilities for microwave circuits (wireless technologies).**

周期性磁性纳米结构中的激发可用于信息传输和处理。这一新兴的研究领域被称为磁振子学。我的研究项目旨在设计，开发和表征这种人工纳米结构的磁性材料，以定制其电磁特性。本计画主要是关于在奈米多孔氧化铝膜上电镀铁磁性奈米线阵列。 重点是微波范围的频谱。通过在介电模板中结合金属和铁磁纳米夹杂物，我们可以利用各种电荷和自旋输运现象，沿着自旋和电荷密度波，以实现自然界中未发现的磁性和介电响应。这可能导致能够在纳米级传输和处理信息的新设备的开发。申请的资金主要用于资助2名博士生。具体目标是：（1）理解限制这种材料实际应用的耗散机制;（2）确定FMNW阵列中激发的集体磁模的性质;（3）研究线内激发对阵列集体激发的影响;（4）研究自旋波的参量放大是否可以主动补偿特定模式的损失。这项工作的成果包括新的可定制微波材料和微波电路（无线技术）的新设计可能性。