Influence of Annealing Temperature on Berthelot-Type Hopping Conduction Mechanism in Carbon-Nickel Composite Films

被引：22
|
作者：
Dalouji, V. [1 ]
Elahi, S. M. [2 ]
Ghaderi, A. [3 ]
Solaymani, S. [3 ]
机构：
[1] Malayer Univ, Dept Phys, Malayer, Iran
[2] Islamic Azad Univ, Sci & Res Branch, Plasma Phys Res Ctr, Tehran, Iran
[3] Islamic Azad Univ, Kermanshah Branch, Young Researchers & Elite Club, Kermanshah, Iran
来源：
CHINESE PHYSICS LETTERS | 2016年 / 33卷 / 05期
关键词：
DEPOSITION;
D O I：
10.1088/0256-307X/33/5/057203
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Electrical conductivity of carbon-nickel composite films annealed at temperatures 300, 500 and 800 degrees 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 50K leads to the Berthelot-type conduction mechanism. It can be seen that the films annealed at 500 degrees C have the maximum conductivity. The extent of the carrier wave function at 500 degrees C has the minima 2.87x10(-7) cm and 2.45x10(-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 degrees C also have the minima 1.13x10(-7) cm and 0.97x10(-7) cm, respectively. The Berthelot temperature for films annealed at 800 degrees C has the minimum of 94.3 K.
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页数：4
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