For the polycrystalline (In2O3)-(ZnO) prepared by annealing in air, we investigated the relation among superconductivity, ρ(T) characteristics and preparation conditions. To clarify the distribution of elements, we studied the microstructure by scanning transmission electron microscopy (STEM) and electron energy-loss spectroscopy (EELS). It was found that 1) The films annealed at restricted regions of annealing temperature T a and time ta show the superconductivity. Transition temperature Tc and carrier density n are Tc<3.3K and n ≈1025/m3∼1026/m3, respectively. 2) The data on EELS spectra mapping of indium plasmon indicate that droplets of the pure indium phase distribute discretely on grain boundaries and near the interface between the film and the glass substrate. 3) Although data in the Tc - Ta relation are scattered, the T c shows relatively good correlation with n, taking a convex form.
|ジャーナル||Journal of Physics: Conference Series|
|出版ステータス||出版済み - 2012|
|イベント||26th International Conference on Low Temperature Physics, LT 2011 - Beijing, 中国|
継続期間: 8 10 2011 → 8 17 2011
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)