Resistivity minimum in granular composites and thin metallic films

A. Gerber, I. Kishon, D. Bartov, M. Karpovski

Research output: Contribution to journalArticlepeer-review


We analyze the temperature dependence of conductivity in thick granular ferromagnetic compounds NiSiO2 and in thin weakly coupled films of Fe, Ni, and Py in the vicinity of the metal-to-insulator transition. Development of a resistivity minimum followed by a logarithmic variation of conductivity at lower temperatures is attributed to the granular structure of compounds and thin films fabricated by conventional deposition techniques. The resistivity minimum is identified as a transition between temperature dependent intragranular metallic conductance and thermally activated intergranular tunneling.

Original languageEnglish
Article number094202
JournalPhysical Review B
Issue number9
StatePublished - 21 Sep 2016

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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