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

拟议研究的主要重点是对具有纳米长度尺度特征尺寸的磁性材料和结构的平衡和非平衡性质进行数值建模和模拟。这样的结构的示例包括磁性多层、粒状磁记录介质、磁性纳米颗粒阵列和磁振子晶格。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中具有相当大的技术重要性。 对该提案中描述的材料的性质进行建模在计算上具有挑战性，因为它们可以将涉及长度和时间尺度的过程联合收割机组合起来，这些过程可以跨越几个数量级。 拟议研究的一个关键要素是一个软件包，MagLua，由我的研究小组在过去五年中开发的。Maglua被设计为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，并且可以显着优于研究人员目前使用的类似商业和开源软件包。 这些材料和使用它们的设备的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容量和处理能力指数增长的关键。因此，所提出的研究的结果，方法和软件所产生的直接技术相关的磁存储系统的制造商和应用磁学领域的研究人员。

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.