Influence of Divalent Impurities on the A-Center
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概要
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With regard to the properties of the A-center of additively colored KBr crystals, it is described how they are modified when the crystals contain divalent cations as impurities, besides a foreign alkali impurity associated with the A-center, Na+ or Li+ ion. Divalent impurities such as Ca++ or Sr++ enhance the growth of the A-center but deteriorate the thermal stability of this center. On the other hand, the existence of these divalent cations does not affect A'-band. The activation energies for the formation and thermal destruction of the A-center are measured as being 0.26 eV and 1.0 eV, respectively, independent of the existence of divalent ions. The ionic conductivity is increased by 50〜70 times in the vicinity of room temperature by additively coloring a sample containing Ca++ or Sr++, and is less increased in case of Ba++ or Cd++.
- 社団法人日本物理学会の論文
- 1967-03-05
著者
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Nishimaki Noriko
Department Of Physics Osaka Women's University
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Nishimaki Noriko
Department Of Physics Osaka Women's University Sumiyoshiku Osaka