Reflectivity ferromagnetic resonance (RFMR) for layer-resolved dynamic study of multi-layered systems

用于多层系统层分辨动态研究的反射率铁磁共振 (RFMR)

• 批准号: 2606404
• 金额: --
• 依托单位: University of Oxford
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2606404
• 关键词: Reflectivity; ferromagnetic; resonance; RFMR; layer

Project description:Magnetic multilayer systems are a prime example of tailored materials in which their functionalities can be precisely controlled through advanced interface and layer engineering. This tuneability has led to their use across a wide range of topical fields, including skyrmions in chiral magnetic materials, synthetic antiferromagnets, and spintronic devices. Magnetic multilayers offer diverse opportunities for the development of ultrafast functional devices, however, an efficient method for determining the dynamic properties as a function of depth throughout such stacks has so far remained elusive. Very recently, we presented a new technique, reflectometry ferromagnetic resonance (RFMR), which provides an avenue to fully explore the magnetization dynamics in magnetic multilayer systems.The RFMR technique builds on our extensive and well recognized work of using x-ray magnetic circular dichroism (XMCD) and x-ray detected ferromagnetic resonance (XFMR) to explore the element-specific magnetization dynamics in magnetic material systems. In this project, in combination with soft x-ray resonant reflectivity, we extend these techniques to gain access to the magnetization dynamics as a function of depth. For the first time, this allows for the selective probing of the magnetization dynamics in the 'hidden' layers, inaccessible to other ferromagnetic resonance methods.The Project aims at fully establishing the RFMR technique at Diamond, making optimal use of the facilities at Diamond, its unique technical opportunities and beamline support, as well as the RF and spectroscopy expertise. In preparation for the project, and to demonstrate the large potential of RFMR in general, we measured the depth-dependence of the magnetization dynamics in a [CoFeB/MgO/Ta]4 multilayer, which is 'invisible' to other techniques, exposing novel dynamic behaviour. In a first step, the student will grow and explore synthetic antiferromagnets, aiming at the unravelling of the magnetic skyrmion dynamics.This project is a joint project with the Diamond Light Source, and in particular with the group of Prof Gerrit van der Laan.This project aligns with EPSRC's research areas "Condensed Matter: Magnetism and Magnetic Materials" and "Spintronics".

项目描述：磁性多层系统是量身定制材料的一个典型示例，其中可以通过高级界面和层工程来精确控制其功能。这种可调性导致了它们在各种局部磁场中的使用，包括手性磁性材料的天空，合成反铁磁铁和旋转器设备。磁性多层为开发超快功能设备提供了不同的机会，但是，确定动态特性作为整个此类堆栈的深度函数的有效方法仍然难以捉摸。 Very recently, we presented a new technique, reflectometry ferromagnetic resonance (RFMR), which provides an avenue to fully explore the magnetization dynamics in magnetic multilayer systems.The RFMR technique builds on our extensive and well recognized work of using x-ray magnetic circular dichroism (XMCD) and x-ray detected ferromagnetic resonance (XFMR) to explore the element-specific磁性材料系统中的磁化动力学。在这个项目中，结合软X射线谐振反射率，我们扩展了这些技术，以访问磁化动力学作为深度的函数。这是第一次可以选择性地探究“隐藏”层中的磁化动态，而其他铁磁共振方法无法接近。该项目旨在在钻石上充分建立钻石的RFMR技术，从而在钻石上进行最佳使用，在Diamond，其独特的技术机会和光束线支持，以及RF和Spectrscoppopy Persemase。为了准备该项目，并证明了RFMR的巨大潜力，我们测量了[COFEB/MGO/TA] 4多层磁化动力学的深度依赖性，这对其他技术是“看不见的”，从而暴露了新型动力学行为。第一步，学生将成长和探索合成的抗fiferromagnets，旨在揭开磁性Skyrmion动力学。该项目是一个与Diamond Light Source的联合项目，尤其是Gerrit van der Laan的组合。