Magnetic and Electrical Characterizations of Half-Metallic Fe3O4 Nanowires


  • This research was supported by the National Science Council through Grant No. NSC 94-2215-E-007-019, and partially supported by the exchanged program of Rotary Yoneyama foundation in Japan and Taiwan.


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The magnetic properties of magnetite (Fe3O4) nanowires are investigated by means of electron holography, which deduces the magnetic information from the phase shift of electrons. The magnetic flux is parallel to the longitudinal axis of the nanowires (see figure). Observations on the magnetization distribution reveal the possibility of regulating the spin current with the half-metallic nanowires, owing to the controlled magnetization distribution in the 1D form.