Modelling and simulation of the equilibrium and non equilibrium properties of magnetic materials

磁性材料平衡和非平衡特性的建模和仿真

• 批准号: 8530-2012
• 负责人: Whitehead, John
• 金额: $ 1.24万
• 依托单位: Memorial University of Newfoundland
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=568598
• 关键词: Modelling; simulation; equilibrium; non; properties

The primary focus of the proposed research is the numerical modeling and simulation of equilibrium and non-equilibrium properties of magnetic materials and structures with characteristic dimensions on the nanometer length scale. Examples of such structures include magnetic multilayers, granular magnetic recording media, magnetic nanoparticle arrays and magnonic lattices. These materials and structures are of considerable technical importance in the manufacture and design of current and potential future technologies used in the storing and processing of data. Modelling the properties of the materials described in this proposal is computationally challenging as they can combine processes involving length and time scales that can span several orders of magnitude. A key element of the proposed research is a software package, MagLua, developed by my research group over the last five years. Designed to be highly modular and scalable, Maglua can be deployed on laptops, workstations or large-scale, multinode high performance computers and can significantly outperform similar commercial and open source software packages that are currently used by researchers. The modelling and simulation of these materials and the devices that use them is key to sustaining the exponential increase in capacity and processing power of electronic devices and communications infrastructure that has taken place over the last 50 years. The results, methodologies and software arising from proposed research are therefore of direct technological relevance to manufacturers of magnetic storage systems and to researchers in the area of applied magnetism.

研究的重点是在纳米尺度上对具有特征尺寸的磁性材料和结构的平衡和非平衡特性进行数值模拟和模拟。这种结构的例子包括磁性多层、颗粒磁记录介质、磁性纳米颗粒阵列和磁晶格。这些材料和结构在制造和设计用于存储和处理数据的当前和潜在的未来技术方面具有相当重要的技术意义。 对本提案中描述的材料的性质进行建模在计算上具有挑战性，因为它们可以结合涉及长度和时间尺度的过程，这些过程可以跨越几个数量级。这项拟议研究的一个关键要素是我的研究小组在过去五年里开发的一个软件包MagLua。Maglua的设计是高度模块化和可扩展的，可以部署在笔记本电脑、工作站或大型、多节点高性能计算机上，并且可以显著超过研究人员目前使用的类似商业和开源软件包。 对这些材料和使用这些材料的设备进行建模和模拟，是维持过去50年来电子设备和通信基础设施的能力和处理能力呈指数级增长的关键。因此，拟议研究产生的结果、方法和软件对磁存储系统制造商和应用磁学领域的研究人员具有直接的技术意义。