Broadband magnetic and dielectric properties of U-type hexaferrite Sr4CoZnFe36O60

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388980%3A_____%2F24%3A00584974" target="_blank" >RIV/61388980:_____/24:00584974 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/24:00584974 RIV/68407700:21340/24:00370464

Výsledek na webu

<a href="https://doi.org/10.1016/j.jmmm.2023.171533" target="_blank" >https://doi.org/10.1016/j.jmmm.2023.171533</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jmmm.2023.171533" target="_blank" >10.1016/j.jmmm.2023.171533</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Broadband magnetic and dielectric properties of U-type hexaferrite Sr4CoZnFe36O60

Popis výsledku v původním jazyce

Ceramics with U-type hexaferrite crystal structure were for the first time prepared and their structural, dielectric, magnetic and magnetoelectric properties were characterized. Broadband dielectric spectra (1 Hz − 1 GHz) showed giant permittivity due to two Maxwell-Wagner dielectric relaxations whose frequencies follow the Arrhenius law. These relaxations are caused by inhomogeneous conductivity in the ceramic grains and their boundaries. Temperature and magnetic field dependences of magnetization revealed a ferrimagnetic phase transition and other two magnetic phase transitions. Very small polarization at 10 K has probably extrinsic origin, so the sample is probably not multiferroic. High-frequency magnetic permeability measured up to 1.8 GHz evidences the Curie-Weiss behavior above Tc2 and Tc3 and two magnetic field-dependent excitations which exhibit anomalies at magnetic phase transitions. We attributed these excitations to the magnetic domain wall dynamics.

Název v anglickém jazyce

Broadband magnetic and dielectric properties of U-type hexaferrite Sr4CoZnFe36O60

Popis výsledku anglicky

Ceramics with U-type hexaferrite crystal structure were for the first time prepared and their structural, dielectric, magnetic and magnetoelectric properties were characterized. Broadband dielectric spectra (1 Hz − 1 GHz) showed giant permittivity due to two Maxwell-Wagner dielectric relaxations whose frequencies follow the Arrhenius law. These relaxations are caused by inhomogeneous conductivity in the ceramic grains and their boundaries. Temperature and magnetic field dependences of magnetization revealed a ferrimagnetic phase transition and other two magnetic phase transitions. Very small polarization at 10 K has probably extrinsic origin, so the sample is probably not multiferroic. High-frequency magnetic permeability measured up to 1.8 GHz evidences the Curie-Weiss behavior above Tc2 and Tc3 and two magnetic field-dependent excitations which exhibit anomalies at magnetic phase transitions. We attributed these excitations to the magnetic domain wall dynamics.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10402 - Inorganic and nuclear chemistry

Projekt

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

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Journal of Magnetism and Magnetic Materials

ISSN

0304-8853

e-ISSN

1873-4766

Svazek periodika

589

Číslo periodika v rámci svazku

Jan

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

12

Strana od-do

171533

Kód UT WoS článku

001134460900001

EID výsledku v databázi Scopus

2-s2.0-85178090005