Collective non-equilibrium dynamics of ferromagnetic nanoparticles with a finite anisotropy in a viscous liquid

粘性液体中具有有限各向异性的铁磁纳米粒子的集体非平衡动力学

• 批准号: 405647072
• 负责人: Professor Dr. Peter Hänggi
• 金额: --
• 依托单位: The State Fund for Fundamental Researches
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/405647072?language=en
• 关键词: Collective; non; equilibrium; dynamics; ferromagnetic

The project objective is to uncover and understand new non-equilibrium states of ferrofluids induced by strong time-periodic external magnetic fields. The project has two main sides, theoretical (Sumy) and computational (Augsburg) ones. The key idea on the theoretical side is to account for both the mechanical rotation and internal magnetic dynamics of a nanoparticle; the influence of thermal fluctuations on this combained dynamics will be investigated within the frameworks of the Langevin and Fokker-Plank formalisms.Computational part is aimed at the development of new algorithms to simulate large ensemble of nanoparticles on graphics processing units (GPUs) and validation of theoretical results. We expect that non-equilibrium mechanisms and effects can provide additional means to control ferrofluids and pave a way to their new applications and technological solutions. In addition, the anticipated results will contribute to a better understanding of ferrofluid physics and improving the knowledge of properties of complex magnetic nanostructures.

该项目的目标是揭示和理解由强时间周期性外部磁场引起的铁磁流体的新的非平衡态。该项目有两个主要方面，理论（苏梅）和计算（奥格斯堡）的。理论方面的关键思想是同时考虑纳米颗粒的机械旋转和内部磁动力学;在Langevin和Fokker-Plank的框架下研究了热涨落对这种复合动力学的影响，计算部分旨在开发新的算法来模拟图形处理单元（GPU）上的大纳米粒子系综。并对理论结果进行了验证。我们期望非平衡机制和效应可以提供额外的手段来控制铁磁流体，并为其新的应用和技术解决方案铺平道路。此外，预期的结果将有助于更好地理解铁磁流体物理和提高复杂的磁性纳米结构的属性的知识。