Low-Temperature DC Carrier Transport in (Co0.45Fe0.45Zr0.10)x(Al2O3)1-x Nanocomposites Sputtered in Mixed Argon-Oxygen Atmosphere

I.A. Svitoa, A.K. Fedotova, A. Saadb, T.N. Koltunowiczc,*, P. Zukowskic, and P. Buryd aBelarusian State University, Independence av. 4, 220030 Minsk, Belarus bAl Balqa Applied University, Physics Department, P.O. Box 4545, Amman 11953, Jordan cDepartment of Electrical Devices and High Voltages Technologies, Lublin University of Technology, Nadbystrzycka 38a, 20-618 Lublin, Poland d University of Žilina, Univerzitna 1, 010 26 Žilina, Slovakia

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This paper studies the temperature dependences (20.45Fe0.45Zr0.10)x(Al2O3)1-x nanocomposites (302 atmosphere. It is shown that at temperatures lower than 100-150 K dependences of DC conductance on temperature for all the studied samples are due to the Shklovski-Efros variable range hopping mechanism. It was also observed that σ(x,T) dependences can be attributed to the formation of FeCo-based oxide "shells" around metallic alloy nanoparticles due to incorporation of oxygen in the vacuum chamber during the deposition procedure.

DOI: 10.12693/APhysPolA.125.1351 PACS numbers: 73.22.-f, 72.20.Ee, 64.60.ah