Influence of Annealing Temperature on Berthelot-Type Hopping Conduction Mechanism in Carbon-Nickel Composite Films
V. Dalouji1**, S. M. Elahi2, A. Ghaderi3, S. Solaymani3
1Department of Physics, Malayer University, Malayer, Iran 2Plasma Physics Research Center, Science and Research Branch, Islamic Azad University, Tehran, Iran 3Young Researchers and Elite Club, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
Abstract：Electrical conductivity of carbon-nickel composite films annealed at temperatures 300, 500 and 800$^{\circ}\!$C is studied over a temperature range of 50–300 K. While the conductivity data above room temperature show extended state conduction, lowering the temperature from 150 to 50 K leads to the Berthelot-type conduction mechanism. It can be seen that the films annealed at 500$^{\circ}\!$C have the maximum conductivity. The extent of the carrier wave function at 500$^{\circ}\!$C has the minima $2.87\times10^{-7}$ cm and $2.45\times10^{-7}$ cm in octahedral-metal stretching vibrations and intrinsic stretching vibrations of the metal at the tetrahedral site, respectively. The average distances between two vibration octahedral and tetrahedral sites at 500$^{\circ}\!$C also have the minima $1.13\times10^{-7}$ cm and $0.97\times10^{-7}$ cm, respectively. The Berthelot temperature for films annealed at 800$^{\circ}\!$C has the minimum of 94.3 K.
. [J]. 中国物理快报, 2016, 33(05): 57203-057203.
V. Dalouji, S. M. Elahi, A. Ghaderi, S. Solaymani. Influence of Annealing Temperature on Berthelot-Type Hopping Conduction Mechanism in Carbon-Nickel Composite Films. Chin. Phys. Lett., 2016, 33(05): 57203-057203.
2016, Vol. 33 
