title: Spin-filter effect in magnetite nanowire.
abstract: Spin-dependent electron transport in individual magnetite (Fe3O4) nanowires contacted with normal metallic electrodes was investigated. Such a configured device demonstrated a spin-filter effect, that is, only the minority spin carriers can transport through the magnetite nanowire due to its negative spin polarization. An anomalous positive magnetoresistance approximately 7.5% is observed at room temperature. Moreover, the magnetoresistance can be controlled via bias voltage.
authors.affiliation: State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, People's Republic of China.
authors.forename: Zhi-Min
authors.initials: ZM
authors.lastname: Liao
authors.forename: Ya-Dong
authors.initials: YD
authors.lastname: Li
authors.forename: Jun
authors.initials: J
authors.lastname: Xu
authors.forename: Jing-Min
authors.initials: JM
authors.lastname: Zhang
authors.forename: Ke
authors.initials: K
authors.lastname: Xia
authors.forename: Da-Peng
authors.initials: DP
authors.lastname: Yu
mesh_terms: D003460:Crystallization / Q000379:methods*; D017097:Electric Impedance; D004559:Electric Wiring / Q000295:instrumentation*; D052203:Ferrosoferric Oxide / Q000032:analysis / Q000737:chemistry*; D005374:Filtration / Q000295:instrumentation / Q000379:methods; D008280:Magnetics; D008422:Materials Testing; D008968:Molecular Conformation; D036103:Nanotechnology / Q000295:instrumentation / Q000379:methods*; D043942:Nanotubes / Q000737:chemistry* / Q000648:ultrastructure; D010316:Particle Size; D013113:Spin Labels
chemical_list: D013113:Spin Labels; D052203:Ferrosoferric Oxide