• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国政府科技报告 >Electrical Relaxation in Rare Earth Doped Cadmium Fluoride
【24h】

Electrical Relaxation in Rare Earth Doped Cadmium Fluoride

机译：稀土掺杂氟化镉的电弛豫

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Audio frequency electrical relaxation measurements have been carried out over the temperature range 5.5 to 300K on CdF2 doped with various concentrations of yttrium and eleven rare earths. Several relaxations are observed some of which are described in the present work. In contrast to rare earths in the alkaline earth and lead fluorides (and alkali metals in the alkaline earth, lead, and cadmium fluorides), no regularity is observed. However, three trends are suggested by the data, none of which is without exception. First, the samples exhibit very little relaxational behaviour for low concentrations. This implies that rare earths in cadmium fluoride, in general, do not form simple rare earth-fluorine interstitial pairs. Second, most of the relaxations occur for high concentrations which suggests the presence of clusters. Finally, the room temperature electrical conductivity is relatively high (about .000001 ohm/cm) for most low concentration materials and tends to decrease with increasing concentration. This is consistent with the first two conclusions if at low concentrations rare earths are incorporated into the lattice in cubic sites and the conductivity is due to either to the non-local charge compensators or electrons. At high concentrations, then, the mobile charges either become trapped or their mobility is simply reduced by the clusters. Keywords: Ion conductor; Electron conductor; and Defect structure.

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号