Accession Number : AD0775715

Title :   Exploratory Development of Magnetic Bubble Domain Material for Application in Air Force Solid State Mass Memory Systems.

Descriptive Note : Interim rept. 27 Nov 72-30 Apr 73,

Corporate Author : ROCKWELL INTERNATIONAL CORP ANAHEIM CALIF ELECTRONICS RESEARCH DIV

Personal Author(s) : Heinz,D. M. ; Henry,R. D.

Report Date : AUG 1973

Pagination or Media Count : 30

Abstract : Tests performed on bubble domain materials indicate that they are resistant to mechanical stresses of 50g. In a study of FMR and bubble domain wall mobility, it was found that the mobility is quite temperature sensitive over the range of interest, that FMR gives an upper bound but not a true value of mobility and that the exchange constant is about 0.6 of the normally assumed value for bubble domain compositions. An investigation aimed at selecting a composition to meet Air Force computer memory goals indicates that lower wall energy materials will have to be employed to reach high data rates. (Author)

Descriptors :   *Memory devices, *Magnetic materials, Erbium compounds, Gallium compounds, Ferrates, Yttrium compounds, Gadolinium compounds, Thulium compounds, Magnetic domains, Domain walls, Magnetic resonance, Ferromagnetism

Subject Categories : Computer Hardware
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE