Unravelling nanoscale ordering by investigating the emerging pathways between electronic structure and magnetism

通过研究电子结构和磁性之间的新兴途径来揭示纳米级有序性

• 批准号: RGPIN-2018-05012
• 负责人: vanLierop, Johan
• 金额: $ 2.99万
• 依托单位: University of Manitoba
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=667539
• 关键词: Unravelling; nanoscale; ordering; investigating; emerging

My research program is concentrated on the study of the mechanisms responsible for the scientifically fascinating and often useful magnetism unique to nanoscale systems. The overarching goal is to develop new approaches and understanding at the quantum-level of nanomagnetism's origins, especially at interfaces. New knowledge generated will address grand challenges associated with controlling materials processes at the level of electrons, and designing and perfecting new forms of matter with atom-level tailored properties. A primary program objective is to identify the physics of magnetic ordering processes at the nanoscale between oxide interfaces. Special attention will be placed on answering questions directed by the field's current focus; spin-orbit coupling effects on surface and interface atomic exchange, and Dzyaloshinski-Moriya interactions at interfaces, by using novel prototype systems of transition metal and metal oxide shells on nanoparticle cores of the iron-oxide polymorphs α-Fe2O3, γ-Fe2O3 and ε-Fe2O3.******The proposed program involves the synthesis of nanomaterials, and their theoretical and experimental investigations. As a pioneer of fabricating precisely controlled interfaces in nanoparticle systems, and their characterization (e.g. my chapter in Magnetic Characterization Techniques for Nanomaterials by Springer), my HQP are able to investigate high quality interfaces using techniques that reveal the physics of the volume control and on/off switch of technologically relevant phenomena. Materials made by HQP are the gateway to the wide spectrum of skills I teach, ranging from conventional laboratory techniques to accelerator/beam line physics. In addition to the conventional tools, we use the newest x-ray synchrotron techniques and ligand field multiplet calculations with atomic probes like Mössbauer spectroscopy. The work requires a deep appreciation of data analysis, theory, and computer modelling. HQP learn to disentangle the connections between electronic structure and magnetism, thereby gaining novel insights of magnetism and elucidating new physics. My program will see us continue to do high impact work as exemplified in our Advanced Materials, ACS Applied Materials and Interfaces, Physical Review B, and Applied Physics Letters articles. Spin-offs include collaborations with Toyota that involve an internship program. The proposed program will ensure that HQP continue to secure top-tier positions like those in the Quantum Condensed Matter Division at Oak Ridge National Laboratory.******This program builds on the tools, techniques and new materials systems I have developed and will continue to augment to enable my long term vision: Exploring open questions in condensed matter and materials physics such as elucidating the physics underlying emergent behaviour at magnetic interfaces, and enabling new technologies like nanocomposite magnets.

我的研究计划集中于对科学的纳米级系统的研究。具有原子级量身定制特性的物质水平的过程。 ，使用新型的跃迁核心。作为在纳米颗粒系统中精确控制的界面的先驱，其表征（例如，Springer的纳米材料的磁性表征技术）使用HQP来研究高质量的界面。对于传统的工具，我们使用最新的X射线同步器技术和配体磁场多重计算，例如MössbauerSpectroscopicy，需要对数据分析，理论和计算机建模之间进行深入了解。因此，在我们的高级材料，ACS应用材料和接口中，我们的效果继续进行，并在实习计划中示例了ACS应用材料和界面。继续在橡树岭国家实验室分开的量子凝结物中确保顶级顶尖端的问题。术语视觉：探索凝结和材料物理学的开放，例如在磁性磁带处阐明物理学，并启用诸如纳米复合磁铁之类的新技术。