Giant magnetoresistance observed in (Fe,Mn)3O4 artificial nanoconstrained structures at room temperature.
We fabricated ferromagnetic oxide (Fe,Mn)(3)O(4) (FMO) nanoconstrained structures using two different steps involving atomic force microscope lithography in combination with a pulsed laser deposition technique. The widths of three FMO nanoconstrained structures were 150, 100, and 50 nm. The I-V characteristic of the 50 nm width FMO nanoconstrained structure changed dramatically from linear to nonlinear after forming the nanoconstrained structure. The magnetoresistance also increased drastically from -0.2% to 150% at room temperature. These results indicate that well-defined complicated artificial transition metal oxide nanostructures allow the creation of huge spin response devices even at room temperature.
Goto
Kazuya
K
The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan.
Kanki
Teruo
T
Kawai
Tomoji
T
Tanaka
Hidekazu
H