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In nanocomposite layers consisting of Co nanoparticles in Al2O3 matrix the thermoelectric power was studied in a wide range of Co content. These layers revealed the giant thermoelectric power in a magnetic field for Co content below percolation threshold. This unusual phenomenon has been explained by hopping electron transport through the media which consist of both, nonmagnetic and magnetic centers...
Magnetic, structural, and electrical properties are reported for ferromagnetic nanocomposites (FMNC) consisting of nanometer size Co ferromagnetic nanoparticles (NP) embedded in Al2O3 dielectric matrix. Cox(Al2O3)100−x FMNC with x = 7.8, 28.2, and 42.2 at.% were obtained in the form of (1–5) µm thick films by modified electron beam physical vapor deposition of Al2O3 and Co vapors condensing on policor...
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