The Development of Spin-Polarized STM with Atomic Resolution

研究的目的是研制SP-STM。(1)1992年，我们成功地观察到了自旋极化隧穿电流，该电流依赖于入射光对GaAs样品的圆度和Ni尖端的塑性。(3)利用超高真空扫描隧道显微镜测量了Ni和Fe的电流自旋极化，反映了能带结构。(4)我们研究了超高真空扫描隧道显微镜对自旋调谐现象的基础研究，证实了我们可以利用砷化镓针尖来研制超高真空扫描隧道显微镜。

The research purpose is developing an SP-STM.(1) In 1992 we succeeded in observing the spin polarized tunneling current which depends on the circularity of the incident light to GaAs samples and plarization of Ni tips. This means the possiblitiy of developing SP-STM.(2) We have developed UHV SP-STM with GaAs and transition metals.(3) Using the UHV STM we measured STS and the current spin polarization against tip bias for Ni and Fe in which energy band structure reflected.(4) We have studied the basic research on spin tuneling phenomena by UHV STM and as a result it has been confirmed that we can develop the SP-STM using a GaAs tip.