Native domain walls. In a phase separated thin film manganite device, magnetic domain walls can be created in ferromagnetic percolating pathways. The magnetoresistance of these devices was tested in different geometries, yielding qualitatively different results. Moreover, the changes in resistance-area product are large enough to suggest that the domain walls display mesoscopic phase separation at the wall centres.
Manganite-carbon nanotube-manganite devices. Ferromagnetic metallic manganite electrodes connected by a carbon nanotube also display magnetoresistance. This demonstrates micron-scale spin coherence in the nanotube, and spin injection between an inorganic half-metallic crystal and the organic molecule.