Temperature Dependence of the Conductivity in Ceramic Materials Containing Nickel Nanoparticles
U. U. AbdurakhmanovPhysics Faculty, National University of Uzbekistan, Tashkent 100174, UzbekistanYayra RakhimovaPhysics Faculty, National University of Uzbekistan, Tashkent 100174, UzbekistanG.I. MukhamedovPhysics Faculty, National University of Uzbekistan, Tashkent 100174, UzbekistanI. BalbergThe Racah Institute of Physics, The Hebrew University, Jerusalem 91904, Israel
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We have measured and analyzed the temperature dependence of the conductivity of composites in which nickel nanoparticles are embedded in an insulating matrix. Observing a transition from a variable‐range hopping to a near‐neighbor hopping, with increasing temperature, is suggested to correspond to the microscopically observed transition from a homogeneous‐like to a percolation‐like electrical network.
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