Accession Number:

ADA048197

Title:

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

Descriptive Note:

Interim rept. Jan-Jun 77,

Corporate Author:

SPERRY RESEARCH CENTER SUDBURY MASS

Report Date:

1977-08-01

Pagination or Media Count:

28.0

Abstract:

Rare-earth iron garnet crystalline compositions were formulated, films deposited by liquid-phase epitaxy, and magnetic evaluation measurements performed. The results of the magnetic property experiments were used to select improved rare-earth iron garnet compositions and film deposition conditions for small-bubble-diameter magnetic memory applications. Representative results of delivered samples are given in tabular form in the appendix. During this report period, samarium thulium-, yttrium samarium thulium-, yttrium samarium lutetium-, and yttrium europium thulium gallium iron garnet films were grown and their static magnetic properties evaluated. Yttrium samarium lutetium calcium germanium iron garnet small-bubble-diameter films were prepared and evaluated for comparison of their magnetic properties. In addition to the static magnetic property experiments, dynamic measurements were performed on LaEuTm3 FeGa5O12 and SmTm3 FeGal5O12 films. Mobilities of 233 and 140 cmsecOe, respectively, were determined for representative samples. These mobility figures reveal that these two small-bubble-diameter compositions would operate at a half megabit data rate. Author

Subject Categories:

  • Electrical and Electronic Equipment
  • Computer Hardware
  • Crystallography
  • Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE