Study on the mechanism of high-frequency magnetization response in nano-magnets using a new proposed RF spin measurement technique

本研究利用我们最新提出的射频自旋测量技术，研究了纳米磁体的高频磁化响应机制。对于我们所提出的技术，我们发现利用磁力显微镜(MFM)针尖可以观察到共面波导(CPW)上的GHz范围的磁场分布。对于纳米磁体的高频磁化响应机理，可以通过共面波铁磁共振测量获得其基本数据。此外，在用我们提出的技术测量纳米磁体中的高频磁化响应时，澄清了几个问题。因此，在这些数据的基础上，指出可以通过改变点参数或点材料来控制高频磁化响应。

This study reports the mechanism of high-frequency (HF) magnetization response in nano-magnet using our newly proposed RF spin measurement technique. As for our proposed technique, it is revealed that GHz-range magnetic field distribution on the coplanar waveguide (CPW) can be observed using a magnetic force microscope (MFM) tip. As for the mechanism of high-frequency magnetization response in nano-magnet, its basic data can be obtained using the ferromagnetic resonance measurement with the CPW. Additionally, several problemes are clarified as the HF magnetization response in nano-magnet is measured using our proposed techniques.Therefore, on the basis of these data, it is pointed out that HF magnetization response can be controlled by changing dot parameters or dot materials.