Using a 16 GHz interferential reflecto-ellipso-polarimeter to study magnetic composite media

Author

Sardos, René ; Escarmant, Jean-François ; Ramdani, Youcef ; Balana, Arthur ; Ellison, William J.

Author_Institution

Bordeaux Univ., Talence,, France

Volume

38

Issue

3

fYear

1990

fDate

3/1/1990 12:00:00 AM

Firstpage

313

Lastpage

318

Abstract

A 16-GHz interferential reflecto-ellipso-polarimeter is described. This apparatus is a combination of a lossy turnstile junction and a three-wave interferometer. One can use it to measure very small variations in the rotation and ellipticity of reflected waves. The device has been used to study waves reflected from a magnetic composite material formed by compression of PVC and ferrite particles, and under the influence of a magnetic field perpendicular to the direction of wave propagation. For ferrite concentrations exceeding 30%, several resonances were observed: they seem to be related to the average distance between the magnetic particles. This contact between the magnetic particles could be called magnetic percolation by analogy with electric percolation

Keywords

measurement theory; microwave reflectometry; radiowave interferometers; radiowave interferometry; 16 GHz; PVC/ferrite particle composite; SHF; interferential reflecto-ellipso-polarimeter; lossy turnstile junction; magnetic composite media; magnetic field; magnetic percolation; microwave measurement; reflected wave ellipticity measurement; reflected wave rotation measurement; three-wave interferometer; Anisotropic magnetoresistance; Ferrites; Magnetic anisotropy; Magnetic field measurement; Magnetic particles; Magnetic resonance; Perpendicular magnetic anisotropy; Polarization; Rotation measurement; Waveguide junctions;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.45350

Filename

45350