Observation of fluctuation induced tunneling conductance in polycrystalline CrO2

Intergranular conduction in half metallic CrO2 is known to occur through a combination of spin dependent tunneling (driven by Coulomb Blockade (CB) effects) together with certain spin independent (SI) hopping processes. We present evidence that in polycrystalline CrO2 with enhanced grain size, both these process (CB effect and SI Hopping)... Show more