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，重要的是了解潜在的材料特性，以及为手头的目的设计和优化这些特性的能力。在加州大学圣克鲁斯分校和曼弗雷德·阿尔布雷希特（德国切姆尼茨理工大学）的磁性纳米结构小组之间的这项合作努力中，制造图案化的纳米磁性材料并对其进行表征，以获得对弯曲金属多层纳米磁体（？nanocaps？）用于高速、高密度磁数据存储。不同的金属多层组合物进行了研究，并比较更传统的平面纳米磁体。一个完整的图片的磁性纳米帽的动态特性，获得使用时间分辨的磁光研究的单个，孤立的磁铁和纳米磁铁的阵列内。这种全面的比较结果在一个单一的nanomagnet.Broad的影响的磁环境的动力学的定量理解的影响，这项研究的结果，从直接的应用程序的结果，这个项目的纳米磁性研究的其他日益增长的领域，如磁存储器，自旋电子学，或生物传感器。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。其中包括不同级别的学生对合作实验室的相互、长期访问，以获得同事互补专业知识的经验。这种体验提高了学生？他们了解不同的文化，研究环境和语言，并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.