Materials World Network: Static and Dynamic Properties of Curved Multilayer Nanomagnets on Self-Assembled Particles

纳米磁体具有广泛的潜在应用，包括下一代高密度磁数据存储、自旋电子器件和磁生物传感。对于所有应用来说，最重要的是了解材料的基本特性，并能够根据手头的目的设计和优化这些特性。在加州大学圣克鲁兹分校和曼弗雷德·阿尔布雷希特（德国开姆尼茨工业大学）的磁性纳米结构小组的合作努力下，制造和表征了图形纳米磁性材料，以获得对弯曲金属多层纳米磁体（纳米帽）材料特性的完整理解，这些材料可用于高速，高密度的磁性数据存储。研究了不同的金属多层成分，并与更传统的扁平纳米磁铁进行了比较。通过对单个、隔离磁体和阵列内纳米磁体的时间分辨磁光研究，获得了磁性纳米帽动态特性的完整图像。这种全面的比较结果是对磁性环境对单个纳米磁铁动力学的影响的定量理解。该项目的研究结果直接应用于纳米磁研究的其他发展领域，如磁记忆、自旋电子学或生物传感器，将产生更广泛的影响。此外，参与团体之间的联合教育活动充分利用了合作的国际性质。这包括不同层次的学生相互访问合作伙伴实验室，以获得同事专业知识互补的经验。这种经历提高了学生的能力。了解不同的文化、研究环境和语言，使他们在这个高度国际化的领域具有竞争优势。

Nanomagnets have a wide range of potential applications, including next generation high-density magnetic data storage, spintronic devices, and magnetic biosensing. Essential for all applications is an understanding of the underlying material properties and the capability to design and optimize these properties for the purpose at hand. In this collaborative effort between UC Santa Cruz and the Magnetic Nanostructures group of Manfred Albrecht (Chemnitz University of Technology, Germany), patterned nanomagnetic materials are fabricated and characterized to obtain a complete understanding of the material properties of curved metallic multilayer nanomagnets (?nanocaps?) for use in high-speed, high density magnetic data storage. Different metallic multilayer compositions are investigated and compared to more conventional flat nanomagnets. A complete picture of the dynamic properties of the magnetic nanocaps is obtained using time-resolved magneto-optical studies of single, isolated magnets and nanomagnets within an array. This comprehensive comparison results in a quantitative understanding of the influence of the magnetic environment on the dynamics of a single nanomagnet.Broader impact of this research results from the straightforward application of the results of this project to other growing areas of nanomagnetic research such as magnetic memory, spintronics, or biosensors. In addition, joint educational activities between the participating groups take full advantage of the international nature of the collaboration. These include mutual, extended visits of students at different levels to the partner laboratory to gain experience in the complementary expertise of their colleagues. This experience improves the students? understanding of different cultures, research environments, and languages, and gives them a competitive edge in this highly international field.