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Spinel vanadates possess rich physics arising from the interaction among spin, orbital and lattice degrees of freedom. We report the dielectric properties of polycrystalline Fe1.8V1.2O4. A thermally activated dielectric relaxation appeared in low temperature due to the inhomogeneous conductivity between grains and grain boundaries. We found an artificial ferroelecticity in this sample. An abnormal...
We investigated the resistive switching characteristics of Au/Ar+ bombarded SrTi0.993Nb0.007O3/In sandwiches. The evolution of the resistive switching polarity with sweeping voltage was observed. Our experiments showed that under a macroscopic electrode the homogeneous trapping-detrapping-type conduction and filament-type conduction coexist and compete with each other. For a large sweeping voltage...
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