Atomic resolved imaging of exchange force interaction force by magnetic resonance scanning force microscopy

我们开发了一种新型的扫描探针显微镜(SPM)系统，它能够实现磁共振扫描力显微镜(MR-SFM)。到目前为止，我们已经成功地用扫描隧道显微镜(STM)模式获得了Si(111)-7x7的原子分辨图像，并证实了所研制的显微镜单元具有足够的刚性。组成了光学干涉仪系统，对光纤边缘与悬臂梁之间的干涉仪信号进行了检测。此外，我们还证实了悬臂梁的Q因子随着温度的降低而增大。然而，Z-粗略接近(惯性驱动)系统(ATTOCUBE的生产)在超高真空(10^&lt；-8&gt；pa)下性能不稳定，我们还没有完成SPM系统的研制。由于Z粗略逼近行为的组件例外，我们确信如果Z粗略逼近移动，SPM系统将完美地运行。我们开发了一种新的方法来制造具有最适合MR-SFM测量的结构的铁磁针尖。这种方法可以得到尖端带有铁磁体的柱尖。元素分析结果表明，柱尖中含有硅原子，存在铁硅化物的可能性。通过磁力显微镜可以获得柱尖与柱尖的磁对比度，从而得出柱尖具有铁磁性的结论，并对NiO(001)表面与柱尖之间的交换作用力进行了实验研究，积累了实验知识。通过对尖端材料间交换作用力强度的比较，得出尖端的磁性是最重要的，需要对尖端的磁性进行控制。

We have developed a novel scanning probe microscope (SPM) system which enables to realize magnetic resonance scanning force microscopy (MR-SFM). Up to now, we have succeeded in obtaining an atomic resolved image of Si(111)-7x7 with scanning tunneling microscopy (STM) mode and we confirmed that the developed microscope cell has an adequate rigidity. We composed a optical interferometer system and detected the signal of interferometer between the edge of optical fiber and cantilever. In addition, we confirmed that Q-factor of the cantilever is increasing with falling in temperature. However, the performance of Z-coarse approach (inertial drive) system (production of attocube) is unstable under the ultra high vacuum (10^<-8> Pa) and we have not finished the development of SPM system yet. Since the component exception for the Z-coarse approach behavior, we are sure of that SPM system perform perfectly if Z-coarse approach moves.We developed a new method making a ferromagnetic tip which has the most suitable structure for MR-SFM measurement. This method can gives us the pillar tip which has a ferromagnet on the tip apex. The results of the elements analysis show that the pillar tip includes silicon atoms and that there is a possibility of iron silicides. However, we concluded that the pillar tip is ferromagnetic property because we can obtain the magnetic contrast with a pillar tip by magnetic force microscopy.We performed the experiments for detecting the exchange interaction force between NiO(001) surface and tips and accumulated the experimental knowledge. Form the results of comparison of strength of exchange interaction force between the materials of tip, we concluded that the magnetic property of tip apex is the most important and we need the control of a magnetic property of tip.