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  • Title: Enhancement of spin polarization in a transition metal oxide ferromagnetic nanodot diode.
    Author: Yamanaka S, Kanki T, Kawai T, Tanaka H.
    Journal: Nano Lett; 2011 Feb 09; 11(2):343-7. PubMed ID: 21171625.
    Abstract:
    Enhancement of spin polarization was observed in a transition metal oxide (Fe,Zn)(3)O(4)/Nb-SrTiO(3) ferromagnetic nanodot Schottky diode. The highly integrated oxide nanodot diodes were constructed using nanoimprint lithography based on a Mo lift-off method in combination with a pulsed laser deposition technique. The junction magnetoresistance of diodes increased as diode size increased. The spin polarization estimated from the thermionic emission model is enhanced from P = 0.74 in a conventional film to P = 0.89 in a nanodot diode whose size is 300 × 300 nm(2). The nanofabrication technique used here will enable us to construct superior transition metal oxide spintronic nanomaterial and nanodevices.
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