Resistive switching and charge accumulation in Hf0.5Zr0.5O2 nanoparticles

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00638044" target="_blank" >RIV/68378271:_____/25:00638044 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1021/acs.jpcc.5c04140" target="_blank" >https://doi.org/10.1021/acs.jpcc.5c04140</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.jpcc.5c04140" target="_blank" >10.1021/acs.jpcc.5c04140</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Resistive switching and charge accumulation in Hf0.5Zr0.5O2 nanoparticles

Popis výsledku v původním jazyce

We revealed the resistive switching, negative differential resistance, and charge accumulation effects in Hf0.5Zr0.5O2 nanopowders sintered by the autocombustion sol–gel method and annealed at temperatures from 500 to 800 °C. The fraction of the tetragonal and/or orthorhombic phases, determined by the X-ray diffraction (XRD), decreases from 91 to 7 vol % with an increase in the annealing temperature from 600 to 800 °C. The electron paramagnetic resonance (EPR) spectra reveal the great amount of oxygen vacancies in the annealed samples, and that the decrease of the tetragonal/orthorhombic phase fraction (observed with an increase in the annealing temperature) correlates with a decrease in the intensity of EPR spectral lines associated with the oxygen vacancies and impurities. This indicates the participation of oxygen vacancies and other defects in the formation of the orthorhombic phase in the Hf0.5Zr0.5O2 powders. To explain the results of electrophysical measurements, we compare the features of the current–voltage characteristics to the phase composition of the Hf0.5Zr0.5O2 powders and with the peculiarities of their EPR spectra. The analysis allows us to relate the resistive switching and charge accumulation observed in Hf0.5Zr0.5O2 nanopowders with the possible appearance of the ferroelectric-like polar regions in the nanoparticles, which agrees with the calculations performed in the framework of the Landau–Ginzburg–Devonshire approach and density functional theory.n

Název v anglickém jazyce

Resistive switching and charge accumulation in Hf0.5Zr0.5O2 nanoparticles

Popis výsledku anglicky

We revealed the resistive switching, negative differential resistance, and charge accumulation effects in Hf0.5Zr0.5O2 nanopowders sintered by the autocombustion sol–gel method and annealed at temperatures from 500 to 800 °C. The fraction of the tetragonal and/or orthorhombic phases, determined by the X-ray diffraction (XRD), decreases from 91 to 7 vol % with an increase in the annealing temperature from 600 to 800 °C. The electron paramagnetic resonance (EPR) spectra reveal the great amount of oxygen vacancies in the annealed samples, and that the decrease of the tetragonal/orthorhombic phase fraction (observed with an increase in the annealing temperature) correlates with a decrease in the intensity of EPR spectral lines associated with the oxygen vacancies and impurities. This indicates the participation of oxygen vacancies and other defects in the formation of the orthorhombic phase in the Hf0.5Zr0.5O2 powders. To explain the results of electrophysical measurements, we compare the features of the current–voltage characteristics to the phase composition of the Hf0.5Zr0.5O2 powders and with the peculiarities of their EPR spectra. The analysis allows us to relate the resistive switching and charge accumulation observed in Hf0.5Zr0.5O2 nanopowders with the possible appearance of the ferroelectric-like polar regions in the nanoparticles, which agrees with the calculations performed in the framework of the Landau–Ginzburg–Devonshire approach and density functional theory.n

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

—

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 Physical Chemistry C

ISSN

1932-7447

e-ISSN

1932-7455

Svazek periodika

129

Číslo periodika v rámci svazku

31

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

14299-14310

Kód UT WoS článku

001539036400001

EID výsledku v databázi Scopus

2-s2.0-105013576401