title: Fabrication of CoPt ultra-sharp single atom tips.
abstract: Two kinds of new nano tips with potential to magnetic application are fabricated. One is a PtCo alloy pyramidal tip formed by surface faceting, the other is a Pt based Co tip formed by the epitaxy with a proper growth mode. Ultra high vacuum-field ion microscopy with atomic resolution is used to investigate the atomic structures of the tip apex after various sharpen treatments.
authors.affiliation: Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan.
authors.forename: Tsu-Yi
authors.initials: TY
authors.lastname: Fu
authors.forename: Chia-Lun
authors.initials: CL
authors.lastname: Chiang
authors.forename: Rung-Jiun
authors.initials: RJ
authors.lastname: Lin
authors.forename: Jin-Long
authors.initials: JL
authors.lastname: Hou
authors.forename: Ing-Shouh
authors.initials: IS
authors.lastname: Hwang
authors.forename: Tien T
authors.initials: TT
authors.lastname: Tsong