High density devices using permalloy propagation of wall-coded bubbles

A close-packed, field access major/minor loop device configuration has evolved from studies of the wall-coded hexagonal bubble lattice. Fully functional chips have been designed, fabricated and tested. Information is coded in the wall structure of 2.7 μm bubbles in a fully populated array of permall...

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Bibliographic Details
Published inIEEE transactions on magnetics Vol. 15; no. 6; pp. 1501 - 1506
Main Authors Brown, B., Burn, R., Desouches, A., Hannon, D., Hsu, T., Liu, C., Moore, E., Saiki, D., Weresin, W.
Format Journal Article
LanguageEnglish
Published IEEE 01.11.1979
Subjects
Drives
Error analysis
Fabrication
Frequency
Laboratories
Lattices
Magnetic fields
Stability
Temperature distribution
Testing
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Summary:A close-packed, field access major/minor loop device configuration has evolved from studies of the wall-coded hexagonal bubble lattice. Fully functional chips have been designed, fabricated and tested. Information is coded in the wall structure of 2.7 μm bubbles in a fully populated array of permalloy driven minor loops. A storage cell of 5.6×5.6 μm 2 is achieved with a 1.4 μm minimum feature. Tests of the close packed storage region show excellent propagation margin and wall state stability over the tested temperature range from 5°C to 70°C at operating frequencies to 400 kHz. Preliminary data in/data out operation has been performed at 100 kHz.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.1979.1060420