Accession Number:

AD0626034

Title:

MAGNETIC PROPERTIES OF MATERIALS IN THE SYSTEM CO SUB DELTA SI SUB DELTA M,

Descriptive Note:

Corporate Author:

HARRY DIAMOND LABS WASHINGTON D C

Personal Author(s):

• Wilcox,David

Report Date:

1965-11-15

Pagination or Media Count:

16.0

Abstract:

Attempts to substitute Co2 and Si4 in the Co sub delta Si sub delta M system in a manner analogous to the isomorphous Co2 and Ti4 substitutions in the system Co sub delta Ti sub delta M were unsuccessful. The Co2 and Si4 substitutions destroyed the original M-type ferrite and a W-type ferrite was formed. The appearance of materials with a cone of magnetocrystalline anisotropy and materials with a negative-anisotropy constant was attributed to the formation of a cobalt-substituted W-type hexagonal ferrite. Microphotographs and X-ray results indicated that most of the Si4 was present as impure tridymite SiO2. Due to the difficulty of separating the mechanically bound SiO2 from the W-ferrite grains, it was not possible to determine whether any Si4 was present in the ferrite structure. Author

Descriptors:

• *MAGNETIC MATERIALS
• MAGNETIC PROPERTIES
• FERRITES
• SILICON COMPOUNDS
• COBALT COMPOUNDS
• FERROMAGNETIC MATERIALS
• TITANIUM COMPOUNDS
• MICROSTRUCTURE
• X RAY DIFFRACTION
• ANISOTROPY

Subject Categories:

• Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE