MAGNETIC PROPERTIES OF MATERIALS IN THE SYSTEM CO SUB DELTA SI SUB DELTA M,
Abstract
Attempts to substitute Co(+2) and Si(+4) in the Co sub delta Si sub delta M system in a manner analogous to the isomorphous Co(+2) and Ti(+4) substitutions in the system Co sub delta Ti sub delta M were unsuccessful. The Co(+2) and Si(+4) 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 Si(+4) 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 Si(+4) was present in the ferrite structure. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 15, 1965
- Accession Number
- AD0626034
Entities
People
- David J Wilcox
Organizations
- Harry Diamond Laboratories