Spin analysis of field emitted electrons from Co/W (111)
by Zhang Jiagang
VII, 64 leaves : ill. ; 30 cm
The field-emitted electrons from ferromagnetic thin film coated refractory metallic tips may be highly spin-polarized. Together with the high brightness offered by the electron field emission, it is possible to construct a new kind of spin-polarized electron source that provides both high spin-polarization and high intensity. In this thesis a system of Co thin films on W (111) surface is studied by utilizing a compact retarding-potential Mott detector of high-efficiency to find out the feasibility of such a spin-polarized electron source. Construction and calibration of the experimental instrument is described in detail and measurement results on spin-polarization of electron beams from Co/W( 111) system under different growth condition are presented.
Permanent URL for this record: https://lbezone.hkust.edu.hk/bib/b651876