PROJECT LIGHTNING
Abstract
The study of the manner in which changes in vacuum deposition parameters affect magnetic properties of permalloy film cores resulted in increased knowledge of the effects of substrate temperature, substate nature and cleaning, residual gas pressure, and rate of deposition. Improved deposition conditions yielded arrays with lower average values of H sub C (Coercivity), and H sub K (anisotropy field) and much lower ranges of magnetic properties. Film switching measurements continued to be used as a research tool in the investigation of the magnetic properties of thin films. A general review of the ferromagnetic resonance work is given. A 9-word, 16-digit search memory was evaluated; the readout pulse length could be reduced to 15 nsec without degrading the output signal. A possible mode of operation for the 24 x 24 shift matrix was developed. When 6 experimental 100-ma RCA germanium tunnel diodes were tested, their switching characteristics were nearly identical. Switching speeds ranged from 1.2 to 2 nsec. (uthor)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 31, 1961
- Accession Number
- AD0268513
Entities
Organizations
- Sperry Corporation