Accession Number:

ADP011675

Title:

Resonant Response of Chiro-Ferrite Media Under FMR and Chiro-FMR Conditions

Descriptive Note:

Corporate Author:

AKADEMIYA NAUK SSSR MOSCOW INST RADIOTEKHNIKI I ELEKTRONIKI

Report Date:

2000-09-29

Pagination or Media Count:

4.0

Abstract:

Presented here are the experimental results about some features of the microwave resonant effects which can be excited in chiro-ferrite media under a constant magnetic field. These results are obtained from the measurement of the transmission, reflection and absorption coefficients in rectangular waveguides, using cylindrical samples of many isolated oriented multistart helices with ferrite core inside. Here it is shown that in the case of the FMR excitation the resonant effects are displayed as two coupled resonances the main chiral resonance and the FMR, which interfere with each other. If the conditions of the Chiro-FMR excitation are fulfilled, the chiral resonance is controlled in a limited frequency band. For a certain value of the constant magnetic field the Chiro- FMR experiences bifurcation with large frequency separation, which can be more than one order larger than the chiral resonance width. The reflection anti-resonance and absorption decrease are observed under bifurcation. The resonant response to governing magnetic field depends essentially on the ferrite concentration.

Subject Categories:

  • Electricity and Magnetism
  • Nuclear Physics and Elementary Particle Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE