Hopping and Non-universal Conductivity in Half-Metallic CrO2 Composites
-
Abstract
We study the dependence of resistivity ρ on conducting volume fraction p in CrO2/TiO2 magnetic composite that is composed of acicular half-metallic particles and spherical insulating particles. The measured percolation threshold was determined to be pc = 0.192. It is found that the conductivity exhibits a non-universal critical exponent t = 2.52±0.08, which may be dominantly attributed to microstructure and higher-order hopping in this composite.
Article Text
-
-
-
About This Article
Cite this article:
CHEN Ya-Jie, ZHANG Xiao-Yu, CAI Tian-Yi, LI Zhen-Ya. Hopping and Non-universal Conductivity in Half-Metallic CrO2 Composites[J]. Chin. Phys. Lett., 2003, 20(5): 721-724.
|
CHEN Ya-Jie, ZHANG Xiao-Yu, CAI Tian-Yi, LI Zhen-Ya. Hopping and Non-universal Conductivity in Half-Metallic CrO2 Composites[J]. Chin. Phys. Lett., 2003, 20(5): 721-724.
|
CHEN Ya-Jie, ZHANG Xiao-Yu, CAI Tian-Yi, LI Zhen-Ya. Hopping and Non-universal Conductivity in Half-Metallic CrO2 Composites[J]. Chin. Phys. Lett., 2003, 20(5): 721-724.
|
CHEN Ya-Jie, ZHANG Xiao-Yu, CAI Tian-Yi, LI Zhen-Ya. Hopping and Non-universal Conductivity in Half-Metallic CrO2 Composites[J]. Chin. Phys. Lett., 2003, 20(5): 721-724.
|
DownLoad: