[20p-A501-1~12] 7.2 Applications and technologies of electron beams

2:15 PM - 2:30 PM JST(5:15 AM - 5:30 AM UTC)

[20p-A501-6] Spin polarization of field emitter with a Co/Pt nano protruded structure with respect to emission current

〇Keitaro Miyata¹, Tatsuo Iwata¹, Shigekazu Nagai¹ (1.Mie Univ.)

Keywords:

Spin-polarized electron source,Field emission,Ferromagnetic material

Improve of spin-resolved microscopic analysis requires spin-polarized electron sources. In this study, we measured dependence of spin-polarization on emission current from a Co/Pt nano protruded structure which is candidate of electron sources with both high brightness and high spin-polarization. The spin-polarization increased as emission current decreased. This result may be caused by that contribution of minority spin electrons to emission current decreases as emission current is lower.