High-frequency and microwave magnetic properties of Ni0.5Zn0.5Fe2O4 spinel ferrite ceramics

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00637746" target="_blank" >RIV/68378271:_____/25:00637746 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.jallcom.2025.181675" target="_blank" >https://doi.org/10.1016/j.jallcom.2025.181675</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jallcom.2025.181675" target="_blank" >10.1016/j.jallcom.2025.181675</a>

Jazyk výsledku

angličtina

Název v původním jazyce

High-frequency and microwave magnetic properties of Ni0.5Zn0.5Fe2O4 spinel ferrite ceramics

Popis výsledku v původním jazyce

Magnetic properties of the Ni0.5Zn0.5Fe2O4 (NZF) spinel ferrite ceramics were studied over a broad frequency range (1 MHz – 50 GHz). Between 10 MHz and 2 GHz, strong temperature-dependent resonance-like magnetic permeability dispersion was observed and attributed to the magnetic domain-wall dynamics. It is responsible for the high magnetic losses, absorption and shielding ability of NZF, and provides high nonlinearity and tunability of the permeability under a weak magnetic field. The attenuation constant of NZF is comparable to those of dielectric-conductor composites and giant permittivity materials. In the microwave range (2–50 GHz), three magnetic excitations dependent on a weak magnetic field were revealed and related to magnons. The lowest-frequency magnon (<10 GHz) is attributed to the natural ferromagnetic resonance, two others are excited between 28 and 44 GHz. Interaction of the magnons and magneto-dielectric resonance modes with electromagnetic waves provides high absorption and shielding efficiency in the GHz range, including 5G and 6G communication frequencies.

Název v anglickém jazyce

High-frequency and microwave magnetic properties of Ni0.5Zn0.5Fe2O4 spinel ferrite ceramics

Popis výsledku anglicky

Magnetic properties of the Ni0.5Zn0.5Fe2O4 (NZF) spinel ferrite ceramics were studied over a broad frequency range (1 MHz – 50 GHz). Between 10 MHz and 2 GHz, strong temperature-dependent resonance-like magnetic permeability dispersion was observed and attributed to the magnetic domain-wall dynamics. It is responsible for the high magnetic losses, absorption and shielding ability of NZF, and provides high nonlinearity and tunability of the permeability under a weak magnetic field. The attenuation constant of NZF is comparable to those of dielectric-conductor composites and giant permittivity materials. In the microwave range (2–50 GHz), three magnetic excitations dependent on a weak magnetic field were revealed and related to magnons. The lowest-frequency magnon (<10 GHz) is attributed to the natural ferromagnetic resonance, two others are excited between 28 and 44 GHz. Interaction of the magnons and magneto-dielectric resonance modes with electromagnetic waves provides high absorption and shielding efficiency in the GHz range, including 5G and 6G communication frequencies.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Alloys and Compounds

ISSN

0925-8388

e-ISSN

1873-4669

Svazek periodika

1036

Číslo periodika v rámci svazku

July

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

10

Strana od-do

181675

Kód UT WoS článku

001543985500002

EID výsledku v databázi Scopus

2-s2.0-105008680148