Materials World Network: Scanned Probe Studies of FMR Driven Spin Injection in Individual Fe-filled Carbon Nanotubes

在这里，我们提出了一个国际合作研究计划，以研究多组分纳米线中的自旋泵浦和自旋输运。我们的实验方法是基于核磁共振力显微镜(MRFM)，这是一种新的成像技术，具有以高分辨率成像三维自旋结构的独特能力。我们选择的材料是填充的多壁碳纳米管(MWCNTs)。Fe-MWCNTs是一种晶态的准一维铁磁纳米线，包裹在保护的碳纳米管壳中。制造和操纵这些纳米管系统的技术已经发展得很好。纳米管的操作步骤包括局部氧化、打开、进一步填充、局部弯曲、附着到预定的样品位置，以及制备电连接的纳米管系统。我们建议对单个Fe-MWCNT进行全局和局部铁磁共振(FMR)实验，包括测量自旋从共振区泵入非共振区的衰减。在拟议的研究过程中，我们打算合成含有铁磁性和普通导体填充的多元填充碳纳米管。这些混合系统将被用来将自旋泵入相邻的纳米管部分，并对电子检测到的自旋泵浦进行成像。

Here we propose an international collaborative research program to investigate spin pumping and spin transport in multicomponent nanowires. Our experimental approach is based on magnetic resonance force microscopy (MRFM), a novel imaging technique which has the unique ability to image spin structures in three dimensions with high resolution.Our materials of choice are filled multiwall carbon nanotubes (MWCNTs). Fe-MWCNTs are crystalline, quasi one-dimensional ferromagnetic nanowires encased in protective carbon nanotube shells. Techniques for fabricating and manipulating these nanotube systems are well developed. Nanotube manipulation procedures include tailoring by local oxidation, opening, further filling, local bending, attaching to predefined sample locations, and preparing electrically connected nanotube systems.We propose global and local ferromagnetic resonance (FMR) experiments on individual Fe-MWCNTs including measurements of the damping due to pumping of spin from resonant into non-resonant regions.We intend to synthesize multicomponent filled carbon nanotubes containing ferromagnetic and normal conductor fillings in the course of the proposed research. These hybrid systems will be used in order to pump spin into adjacent nanotube sections and to image electrically detected spin pumping.