CZOCHRALSKI GROWTH OF LAALO3.
Abstract
A new growth chamber was built to provide the capacity for growing boules capable of yielding 1/4-inch diameter by 3-inch length rods of Cr(3+) doped LaAlO3. Using this growth chamber, a seed rod of the correct orientation (111) was developed. Crystals containing Ca(2+) or Si(4+) were also grown to confirm the belief that they are the color center producing agents. As a result of these tests, additional color center producing agents were found, La(3+) lattice vacancies, and by proper annealing, these can be eliminated. Detwinning studies demonstrated the optimum direction to be the (111) direction of the pseudo-cube. Detwinning equipment was built which allows rods of either 1/8 or 1/4-inch diameter and up to 3-inches in length to be detwinned. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 31, 1966
- Accession Number
- AD0627149
Entities
People
- C. D. Brandle
- F. R. Charvat
- H. M. Dess