Nonvolatile Transport States in Ferrite Thin Films Induced by Field-Effect Involving Redox Processes

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Abstract

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The conductivity and magnetoresistance of a practically useful ferrite compound are found to be electrically programmable in a nonvolatile manner. Electric-double-layer gating using an ionic liquid changes the surface oxidation state of spinel zinc ferrite via reversible redox processes. This unique electric-field effect, distinct from conventional electrostatic carrier doping, provides a new route for developing oxide-based field-effect devices.

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