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Optical and ESR Studies of Co(2+): Beta' Alumina.
CALIFORNIA UNIV LOS ANGELES DEPT OF MATERIALS SCIENCE AND ENGINEERING
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The Beta aluminas have recently been reported to exhibit several interesting optical properties, including lasing action. The materials are doped by ion exchange reactions, and techniques for introducing numerous lanthanide and transition metal ions have been demonstrated. Among the transition metal ions cobaltion is of interest for tunable laser systems in the infra red because of the transition which occurs in an octahedral crystal field. As a laser host for Cobalt ion Beta alumina is potentially significant because previous crystallographic studies of Manganese ion and Zinc Beta aluminas indicated that the transition metal ions occupied both octahedral and tetrahedral sites within the conduction plane. In the present paper we use optical absorption and ESR spectra to help identify the site symmetry for Cobalt ion in Beta alumina.
APPROVED FOR PUBLIC RELEASE