Giant magnetoresistance observed in (Fe,Mn)3O4 artificial nanoconstrained structures at room temperature.
basic_science · Level V
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- Record sourced from PubMed, PMID 20698588.
- Also identified by DOI 10.1021/nl100542a.
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Abstract
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.