COMPUTER STUDY OF SUBSIDIARY RESONANCE PHENOMENA IN MICROWAVE MAGNETIC MATERIALS
Abstract
A computer study at X-band frequencies of the threshold fields for subsidiary resonance phenomena in a wide range of magnetic materials has been conducted. The variation of the critical power for spin-wave excitation has been determined as a function of the material parameters combined with the geometry of the ferrite material. The investigation has shown that, at a given frequency, low-level operation of microwave devices that utilize subsidiary resonance absorption requires a material with a very narrow spin-wave linewidth and a saturation magnetization in the order of 5000 gauss. The optimum material geometry that yields the lowest threshold is the case where the demagnetizing factor N sub z = 0, where z represents the direction of the applied dc field, and the transverse demagnetizing factors N sub x and N sub y are equal to 0.5. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1968
- Accession Number
- AD0670013
Entities
People
- Charles M. Desantis
- Joseph W. Mcgowan
- Samuel Dixon Jr.
Organizations
- United States Army Communications-Electronics Command