Accession Number:

ADA048462

Title:

Magnetic LPE Crystalline Films for Small Bubble Diameter Cylindrical-Domain Memory Applications.

Descriptive Note:

Interim rept. Jun-Dec 76,

Corporate Author:

SPERRY RESEARCH CENTER SUDBURY MASS

Report Date:

1977-07-01

Pagination or Media Count:

34.0

Abstract:

This was an interim technical report which covers the research performed during the first six months of the contract period. The report includes a description of the preparation, characterization and magnetic property evaluation of liquid-phase epitaxial LPE crystalline-garnet films for 2 micron bubble diameter memory devices. Over four-hundred and fifty different LPE preparations were made and thin films grown. Representative results of this research were presented in tabular form. Magnetic measurements included, in addition to the usual experiments, temperature dependence data. Of the many garnet compositions investigated, lanthanum europium thulium gallium iron garnet and samarium thulium gallium iron garnet exhibited percentage changes over the -55 to 125 C temperature range which are well within the contract specified limits. The q for these films was found to be 5 to 6, as compared to the design goal minimum value of 3. Therefore, since all static small bubble diameter properties of these two LPE film compositions more than meet the contract objectives, the program will proceed with the measurement of their dynamic magnetic properties. Author

Subject Categories:

  • Computer Hardware
  • Manufacturing and Industrial Engineering and Control of Production Systems
  • Crystallography
  • Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE