Structure and magnetic properties of synthesized fine cerium dioxide nanoparticles

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F44555601%3A13520%2F18%3A43893700" target="_blank" >RIV/44555601:13520/18:43893700 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/18:00490224 RIV/68081723:_____/18:00490224 RIV/61989100:27240/18:10238846

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.jallcom.2018.04.115" target="_blank" >http://dx.doi.org/10.1016/j.jallcom.2018.04.115</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jallcom.2018.04.115" target="_blank" >10.1016/j.jallcom.2018.04.115</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Structure and magnetic properties of synthesized fine cerium dioxide nanoparticles

Popis výsledku v původním jazyce

Cerium dioxide, which is diamagnetic in its bulk crystalline fluorite form, exhibits ferromagnetism when prepared as a nanopowder. This characteristic has recently been ascribed to localized electron spin moments formed at oxygen vacancies near the nanoparticle surfaces. In the present study, a number of structure-sensitive and magnetic methods were applied to CeO2 nanopowders prepared from the carbonate precursor by treatment at different calcination temperatures. The low-temperature magnetization measurements subsequently performed via 57Fe MEURossbauer spectroscopy revealed the presence of small amounts of iron impurities in the samples as well as in the chemicals used to prepare them. These experimental findings and our theoretical data analysis of iron impurities at the ppm level provide a plausible explanation for the ferromagnetic behaviour of cerium oxide.

Název v anglickém jazyce

Structure and magnetic properties of synthesized fine cerium dioxide nanoparticles

Popis výsledku anglicky

Cerium dioxide, which is diamagnetic in its bulk crystalline fluorite form, exhibits ferromagnetism when prepared as a nanopowder. This characteristic has recently been ascribed to localized electron spin moments formed at oxygen vacancies near the nanoparticle surfaces. In the present study, a number of structure-sensitive and magnetic methods were applied to CeO2 nanopowders prepared from the carbonate precursor by treatment at different calcination temperatures. The low-temperature magnetization measurements subsequently performed via 57Fe MEURossbauer spectroscopy revealed the presence of small amounts of iron impurities in the samples as well as in the chemicals used to prepare them. These experimental findings and our theoretical data analysis of iron impurities at the ppm level provide a plausible explanation for the ferromagnetic behaviour of cerium oxide.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

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

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Journal of Alloys and Compounds

ISSN

0925-8388

e-ISSN

—

Svazek periodika

2018

Číslo periodika v rámci svazku

753

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

167-175

Kód UT WoS článku

000432674100023

EID výsledku v databázi Scopus

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