US 4613955
BIAS MAGNET TEMPERATURE TRACKING OF MAGNETIC BUBBLE MEMORIES
Assignee
BELL TELEPHONE LABORATORIES INCORPORATED A NY CORP
Filed
Sep 23, 1983
Granted
Sep 23, 1986
Location
NEW PROVIDENCE NJ US
Abstract
Wide temperature range magnetic bubble memories are realized by using new compositions of rare earth garnets which require nonlinear bias field for operation over a given temperature range. The bias field structure for providing the corresponding nonlinear bias field includes plates of barium ferrite plus additional plates of Ni-Cu alloys and/or polycrystalline dysprosium (or other rare earths, singly or in combination) iron garnet to provide a nonlinear bias field versus temperature characteristic to match that of the bubble layer.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Jun 13, 1984
Rescinded
Jun 17, 1985
Duration
1 year
Inventor
- 1RICHARD C. SHERWOOD
Record Details
- Patent number
- US 4613955
- Application
- 06535249
- Aerospace match
- No
- Dataset source
- 35 USC §181 SO records
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BELL TELEPHONE LABORATORIES INCORPORATED A NY CORPBack to patent indexSource: USPTO 35 USC §181 secrecy order records