Development of Advanced Microwave Components and Techniques - Planar Hexagonal Ferrites and Devices
Abstract
The preparation process evolved is capable of producing good ceramic materials with high density and good alignment. These materials do not as yet exhibit as narrow a linewidth as expected. Trivalent Al substituted for trivalent Fe apparently forms a second phase material rather than entering the Y structure. A deficiency of Fe helps to lower the dielectric loss tangent of Zn2Y, perhaps by offsetting the Zn loss on firing, but this step is not universally effective among the other Y compounds. By using the alignment techniques developed for these planar materials, cubic ferrites can be successfully oriented even in cases of small anisotropy. At least partially successful alignment was achieved on yttrium iron garnet with anisotropy fields of 40 oersteds. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1963
- Accession Number
- AD0427822