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

Result code in 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>
Result on the web
<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>

Result language
angličtina
Original language name
High-frequency and microwave magnetic properties of Ni0.5Zn0.5Fe2O4 spinel ferrite ceramics
Original language description
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.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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