Accession Number:

AD0749806

Title:

Magnetic Bubble Materials

Descriptive Note:

Final rept. 11 Jan-11 Jul 1972

Corporate Author:

MONSANTO RESEARCH CORP ST LOUIS MO

Report Date:

1972-08-11

Pagination or Media Count:

89.0

Abstract:

The object of this project was to establish a reliable supply of high quality magnetic bubble materials to support the device work of various Department of Defense Agencies. Bulk, single crystals of Gd3Ga5O12 were grown by the Czochralski method. Crystals containing low dislocation densities were routinely grown and some progress was made toward eliminating the strain core of such crystals by employing high crystal rotation rates. Procedures were established for polishing 111 wafers sliced from the Gd3Ga5O12 crystals. Work damage-free surfaces, which proved excellent for epitaxial film growth, were produced by a process involving a final polish on a Syton-flooded, Corfam lap. Epitaxial films of six different compositions were deposited on 111 Gd3Ga5O12 substrates from solution in PbO-B2O3 solvent by the simple dipping method. Solution recipes and growth conditions for each composition are discussed in detail in this report. Some general characteristics of the PbO-B2O3 solvent are described and the PbO-B2O3 solvent are described and the PbO-B2O3 and BaO-F2- B2O3 solvent systems are compared.

Subject Categories:

  • Computer Hardware
  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE