Accession Number:

AD0266898

Title:

HEXAGONAL MAGNETIC MATERIALS FOR MICROWAVE APPLICATIONS

Descriptive Note:

Final rept. May 1956-Jul 1961

Corporate Author:

PHILIPS LABS INC IRVINGTON-ON-HUDSON NY

Personal Author(s):

Report Date:

1961-07-01

Pagination or Media Count:

110.0

Abstract:

Anisotropic samples of oxidic magnetic substances possessing hexagonal structures were prepared and studied for their permanent magnet and microwave properties. Production of circumferentially oriented toroids of one of these materials is discussed. An investigation was made of the effect on the microwave properties of the partial replacement of Fe ions by Al or Ti Co ions in highly anisotropic magnetic materials. The most striking effect was the rapid change of the room temperature anisotropy field with composition. The ferrimagnetic resonance linewidth of ferromagnetic materials in the oriented polycrystalline form was about 2000 oersteds. Resonant isolators with Al substituted materials performed satisfactorily. The feasibility of tailor-making microwave magnetic materials having anisotropy fields in the range 7000 to over 5000 oersteds is seen.

Subject Categories:

  • Electricity and Magnetism
  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE