title: Enhancement of spin polarization in a transition metal oxide ferromagnetic nanodot diode.
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.
authors.affiliation: The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka, Japan.
authors.forename: Satoru
authors.initials: S
authors.lastname: Yamanaka
authors.forename: Teruo
authors.initials: T
authors.lastname: Kanki
authors.forename: Tomoji
authors.initials: T
authors.lastname: Kawai
authors.forename: Hidekazu
authors.initials: H
authors.lastname: Tanaka
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D008280:Magnetics / Q000295:instrumentation*; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000295:instrumentation*; D010087:Oxides / Q000737:chemistry*; D010316:Particle Size; D012666:Semiconductors; D028561:Transition Elements / Q000737:chemistry*
chemical_list: D010087:Oxides; D028561:Transition Elements