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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

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

Project

—

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

Name of the periodical

Journal of Physical Chemistry C

ISSN

1932-7447

e-ISSN

1932-7455

Volume of the periodical

129

Issue of the periodical within the volume

31

Country of publishing house

US - UNITED STATES

Number of pages

12

Pages from-to

14299-14310

UT code for WoS article

001539036400001

EID of the result in the Scopus database

2-s2.0-105013576401