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ISSN 2415-3400 (Online)
ISSN 1028-821X (Print)

A magnetoactive metamaterial based on a structured ferrite

heading: 
SOLID-STATE AND PLASMA RADIOPHYSICS
Polevoy, SY, Kharchenko, GO, Tarapov, SI, Kravchuk, ОO, Kurselis, K, Kiyan, R, Chichkov, BN, Slipchenko, NI
Organization: 

 

O.Ya. Usikov Institute for Radiophysics and Electronics of the NASU
12, Acad. Proskura St., Kharkov, 61085, Ukraine

Kharkiv National University of Radio Electronics
14, Nauky Ave., Kharkiv, 61166, Ukraine

V.N. Karazin Kharkiv National University
4, Svoboda Sq., Kharkiv, 61022, Ukraine
 

Institute of Quantum Optics, Leibniz University Hannover
Welfengarten 1, D-30167 Hannover, Germany
 

Institute for Scintillation Materials of NAS of Ukraine
60, Nauky Ave., Kharkiv, 61072, Ukraine

E-mail: polevoy@ire.kharkov.ua

 
https://doi.org/10.15407/rej2021.01.028
Language: english
Abstract: 

 

Subject and Purpose. The use of spatially structured ferromagnets is promising for designing materials with unique predetermined electromagnetic properties welcome to the development of magnetically controlled microwave and optical devices. The paper addresses the electromagnetic properties of structured ferrite samples of a different shape (spatial geometry) and is devoted to their research by the method of electron spin resonance (ESR).

Methods and methodology. The research into magnetic properties of structured ferrite samples was performed by the ESR method. The measurements of transmission coefficient spectra were carried out inside a rectangular waveguide with an external magnetic field applied.

Results. We have experimentally shown that over a range of external magnetic field strengths, the frequency of the ferromagnetic resonance (FMR) of grooved ferrite samples (groove type spatial geometry) increases with the groove depth. The FMR frequency depends also on the groove orientation relative to the long side of the sample. We have shown that as the external static magnetic field approaches the saturation field of the ferrite, the FMR frequency dependence on the external static magnetic field demonstrates "jump-like" behavior. And as the magnetic field exceeds the ferrite saturation field, the FMR frequency dependence on the groove depth gets a monotonic character and rises with the further growth of the field strength. 

Conclusion. We have shown that the use of structured ferrites as microwave electronics components becomes reasonable at magnetic field strengths exceeding the saturation field of the ferrite. At these fields, such a ferrite offers a monotonically increasing dependence of the resonant frequency on the external magnetic field and on the depth of grooves on the ferrite surface. Structured ferrites are promising in the microwave range as components of controlled filters, polarizers, anisotropic ferrite resonators since they can provide predetermined effective permeability and anisotropy
Keywords: ferrite, ferromagnetic resonance, metamaterial, microwave frequency range

Manuscript submitted  31.08.2020
Radiofiz. elektron. 2021, 26(1): 28-34
Full text (PDF)

 

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