AVS 47th International Symposium
    Magnetic Interfaces and Nanostructures Tuesday Sessions
       Session MI+NS+NANO 6-TuA

Paper MI+NS+NANO 6-TuA6
Self-assembled Magnetic Nanowires Studied with Spin-polarized Scanning Tunneling Microscopy

Tuesday, October 3, 2000, 3:40 pm, Room 206

Session: Magnetic Imaging II
Presenter: T.-H. Kim, Seoul National University, Korea
Authors: T.-H. Kim, Seoul National University, Korea
W.-G. Park, Seoul National University, Korea
Y. Obukhov, Seoul National University, Korea
Y. Kuk, Seoul National University, Korea
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In thin film of immiscible Co and Ag alloys, nanowires have been observed. The alternating stripes, magnetic Co stripes and non-magnetic Ag stripes, are formed on W(110) substrate by the driving force of the phase separation. The film can be grown sequentially, or deposited simultaneously. The periods of the stripes are found to be 20 to 30 Å, perpendicular to the long axis of the stripes. The relations between the morphology and the magnetic contrast of the self-assembled magnetic nanowires have been studied with spin-polarized scanning tunneling microscopy. Using an electromagnet for tip magnetization, the magnetic field can be applied to the soft magnetic tip both parallel and perpendicular to the axis of the tip. With this setup, we are able to image the direction of the magnetization of the sample.