Fabrication and characterization of spin-polarized Co2MnGa field emission electron source. (13th June 2019)

• Record Type: Journal Article
• Authors: Ishikawa, Tsuyoshi; Nagai, Shigekazu; Oh-ishi, Keiichiro; Ikemizu, Hiromu; Hata, Koichi
• Is Part Of: Applied physics express. Volume 12:Number 7(2019)
• Publication Date: 2019-06-13
• Subjects: Physics -- Periodicals; Technology -- Periodicals; 621.05
• DOI: 10.7567/1882-0786/ab2685
• Languages: English
• ISSNs: 1882-0778

Abstract

Abstract: Spin-polarized electron emission from a Heusler alloy Co2 MnGa field emitter was confirmed. The Co2 MnGa tip was fabricated from Co2 MnGa thin film epitaxially grown on MgO(100) substrate. An atomically clean surface of emitter apex was successfully obtained by field evaporation. It was confirmed that the (010) surface of the Co2 MnGa emitter has a rather low work-function by the field emission characteristics from the clean surface. The spin-polarization of 66% was achieved from the field-emitted electrons around the (010) face at 42 K, which is in agreement with the theoretical results of the surface spin-polarization of Co2 MnGa [J. Appl. Phys. 115, 113905 (2014)].