Accession Number:

ADA142195

Title:

Preparation of Mixed Perovskite Oxides for Blue-Green Lasers

Descriptive Note:

Annual rpet. Oct 1982-Jan 1984

Corporate Author:

LITTON SYSTEMS INC MORRIS PLAINS NJ AIRTRON DIV

Personal Author(s):

Report Date:

1984-02-01

Pagination or Media Count:

52.0

Abstract:

Mixed crystals of the perovskite type structure of the system La A1 1-x Sc x, 03 were examine dover the compositions of x 0.15-0.30. Single crystals were grown from melts in iridium crucibles using the Czochralski method. Seed crystals of 111 pure La A1 Q3, were used. The growth atmosphere was controlled at 99.75 N2 and 0.25 H2. Dopants of Ce3 were maintained at 0. 01-0.05 atomic per cent. Preliminary work on polycrystalline materials showed that blue-green luminescence at 485 nm was found. The grown crystals had various amounts of Sc incorporated and were usually translucent. At the x .30 formulation of melt, about 60 - 75 of Sc is believed to enter the crystal. No direct evidence was found for ordered type structures. The phase data, compositions, crystal quality, luminescence data, and x-ray results are discussed.

Subject Categories:

  • Lasers and Masers
  • Crystallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE