[18a-E318-1~14] 【CS.7】 Code-sharing Session of 7.2 & 7.4 & 9.5

[18a-E318-8] Spin polarization of field-emitted electrons from <100>-oriented Co₂MnGa emitter

〇Shigekazu Nagai¹, Hiromu Ikemizu¹, Koichi Hata¹ (1.Mie Univ)

Keywords:Field electron emitter, Half metal, Heusler Alloy

For a development of field electron emitters with high spin polarization, we fabricated Heusler alloy Co₂MnGa emitters which expected exhibit half-metallic property and evaluated the spin polarization of field-emitted electrons from the emitters. The spin polarization of field emitted electrons from Co₂MnGa(100) surface is 60-70% when the surface was cleaned by hydrogen-promoted field evaporation and identified by field ion microscope. The value of the spin polarization well agrees with that expected by the first-principle calculation.