Ac-conductivity and structural, magnetic, dielectric, and photocatalytic properties of Gd doped BiFeO3 nanoparticles

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F26%3A0199167" target="_blank" >RIV/00216305:26220/26:0199167 - isvavai.cz</a>

Výsledek na webu

<a href="https://pubs.rsc.org/en/content/articlelanding/2025/tc/d5tc01606a" target="_blank" >https://pubs.rsc.org/en/content/articlelanding/2025/tc/d5tc01606a</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/d5tc01606a" target="_blank" >10.1039/d5tc01606a</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Ac-conductivity and structural, magnetic, dielectric, and photocatalytic properties of Gd doped BiFeO3 nanoparticles

Popis výsledku v původním jazyce

In this study, a series of Bi1-xGdxFeO3 (x = 0, 0.05, 0.1, 0.15, and 0.2) samples synthesized by a combustion method were investigated. The effect of Gd dopant on the crystal structure, morphology, magnetic, electrical and photocatalytic properties of nanoparticles was studied. X-ray diffraction showed that the samples with x = 0.1 and 0.15 contain two-phase systems R3c + Pbam and R3c + Pnma, respectively. UV-vis spectroscopy showed that the optical band gap lies in the range of 2.08-1.94 eV, which implies possible applications in the visible spectrum. The samples demonstrated ferromagnetic behavior with the highest magnetization values for Bi0.9Gd0.1FeO3. Three anomalies were found in the temperature dependences of the permittivity epsilon '(T) in the temperature range of similar to 250 degrees C to similar to 310 degrees C and TN. The absence of an unambiguous dependence of the dielectric characteristics with increasing Gd concentration was observed. The frequency dependence of the conductivity sigma ac(omega) at different temperatures was analyzed based on the universal Jonscher's power law sigma similar to omega s. The frequency dependence of the conductivity sigma ac was interpreted within the framework of the correlated barrier jumping (CBH) model. The plots of ln sigma acvs. 103/T revealed the presence of various thermally activated conductivity mechanisms. A positive effect of the Gd dopant on the improvement of the photocatalytic properties of BiFeO3 was established.

Název v anglickém jazyce

Ac-conductivity and structural, magnetic, dielectric, and photocatalytic properties of Gd doped BiFeO3 nanoparticles

Popis výsledku anglicky

In this study, a series of Bi1-xGdxFeO3 (x = 0, 0.05, 0.1, 0.15, and 0.2) samples synthesized by a combustion method were investigated. The effect of Gd dopant on the crystal structure, morphology, magnetic, electrical and photocatalytic properties of nanoparticles was studied. X-ray diffraction showed that the samples with x = 0.1 and 0.15 contain two-phase systems R3c + Pbam and R3c + Pnma, respectively. UV-vis spectroscopy showed that the optical band gap lies in the range of 2.08-1.94 eV, which implies possible applications in the visible spectrum. The samples demonstrated ferromagnetic behavior with the highest magnetization values for Bi0.9Gd0.1FeO3. Three anomalies were found in the temperature dependences of the permittivity epsilon '(T) in the temperature range of similar to 250 degrees C to similar to 310 degrees C and TN. The absence of an unambiguous dependence of the dielectric characteristics with increasing Gd concentration was observed. The frequency dependence of the conductivity sigma ac(omega) at different temperatures was analyzed based on the universal Jonscher's power law sigma similar to omega s. The frequency dependence of the conductivity sigma ac was interpreted within the framework of the correlated barrier jumping (CBH) model. The plots of ln sigma acvs. 103/T revealed the presence of various thermally activated conductivity mechanisms. A positive effect of the Gd dopant on the improvement of the photocatalytic properties of BiFeO3 was established.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

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

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Journal of Materials Chemistry C

ISSN

2050-7526

e-ISSN

2050-7534

Svazek periodika

36

Číslo periodika v rámci svazku

04 Aug 2025

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

18

Strana od-do

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Kód UT WoS článku

001554798000001

EID výsledku v databázi Scopus

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