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Progress in designing of new magnetoelectronic nanostructures, particularly, for exploitation at frequenciesup to GHz requires new artificial materials combining tunable magnetic and electric properties with lowcosttechnological opportunity to form miniature devices. Recent experiments have proved that in this contextmetal-insulator film heterostructures are prospective for synthesis of materials with tailored physicalproperties that could be controlled with external magnetic and electric fields.Summary of recent experimental results on phase composition, magnetic properties, magnetoresistivity andelectrical conductivity of nanostructured composite thin films including multiferroic and thermoelectricfilms for high-frequency applications is presented. Technological approaches based on variation of theirchemical and phase composition and deposition regimes are proposed for tuning films properties towardstheir desired combination with respect to potential application in designing of planar (non-coil) inductiveelements, thermoelectric microgenerators, magnetic sensors, etc. Physical mechanisms and models responsiblefor magnetic and electric properties of composite films are analyzed.Additionally, structure and properties of functional template-assisted composite/multilayered nanostructureson semiconductive substrate with controlled shape and composition for preparation of tunable magnetoelectronicdevices are discussed. Effect of magnetoresistivity modulation realized on Schottky metal/semiconductor barrier by application of external voltage to template-based nanostructures is considered.
