Defect-property correlations in garnet crystals. VI. The electrical conductivity, defect structure, and optical properties of luminescent calcium and cerium-doped yttriu... Academic Article uri icon

abstract

  • The electrical and optical properties of calcium and cerium‐doped yttrium aluminum garnet (Ca, Ce: YAG) have been studied. Ca, Ce: YAG is a mixed ionic and electronic conductor with an ionic conductivity activation energy of 4.3 eV. Evidence of cluster formation with a consequent higher‐than‐expected activation energy is presented. The cerium normally enters the crystal as Ce+ 4, but it may be converted to Ce+ 3 under reducing atmospheres at elevated temperatures.

publication date

  • February 1, 1992