Phase Transition and Structural Defects in Complex Iron-Containing Oxide Glasses Probed By Positron Annihilation
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10510745" target="_blank" >RIV/00216208:11320/25:10510745 - isvavai.cz</a>
Výsledek na webu
<a href="https://doi.org/10.4028/p-ofOO4M" target="_blank" >https://doi.org/10.4028/p-ofOO4M</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.4028/p-ofOO4M" target="_blank" >10.4028/p-ofOO4M</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Phase Transition and Structural Defects in Complex Iron-Containing Oxide Glasses Probed By Positron Annihilation
Popis výsledku v původním jazyce
Glasses with the compositions (100−x)(0.16Na<inf>2</inf>O/0.10MnO/0.74SiO<inf>2</inf>)/xFe<inf>2</inf>O<inf>3</inf> (x = 0-15 mol%) were prepared and characterized using positron annihilation lifetime spectroscopy (PALS) and coincidence Doppler broadening (CDB) spectroscopy. The PALS method applied seems to be sensitive to verify the Verwey phase transition, discovered for bulk magnetite (Fe<inf>3</inf>O<inf>4</inf>), from a high-temperature ‘bad metal’ conducting phase to a low-temperature insulating phase occurring at about 120 K in the glasses examined. It means that at relatively low concentration of Fe<inf>2</inf>O<inf>3</inf> up to 15 mol%, the magnetite crystals could be synthesized in the amorphous matrix of Na<inf>2</inf>O/MnO/SiO<inf>2</inf>/Fe<inf>2</inf>O<inf>3</inf> glass that is important for numerous practical applications. The CDB measurements showed that the majority of positrons in the glass samples studied are annihilated in the vicinity of oxygen anions and iron-oxide containing glasses have lower concentration of oxygen-vacancy defects compared to the non-iron containing base glass.
Název v anglickém jazyce
Phase Transition and Structural Defects in Complex Iron-Containing Oxide Glasses Probed By Positron Annihilation
Popis výsledku anglicky
Glasses with the compositions (100−x)(0.16Na<inf>2</inf>O/0.10MnO/0.74SiO<inf>2</inf>)/xFe<inf>2</inf>O<inf>3</inf> (x = 0-15 mol%) were prepared and characterized using positron annihilation lifetime spectroscopy (PALS) and coincidence Doppler broadening (CDB) spectroscopy. The PALS method applied seems to be sensitive to verify the Verwey phase transition, discovered for bulk magnetite (Fe<inf>3</inf>O<inf>4</inf>), from a high-temperature ‘bad metal’ conducting phase to a low-temperature insulating phase occurring at about 120 K in the glasses examined. It means that at relatively low concentration of Fe<inf>2</inf>O<inf>3</inf> up to 15 mol%, the magnetite crystals could be synthesized in the amorphous matrix of Na<inf>2</inf>O/MnO/SiO<inf>2</inf>/Fe<inf>2</inf>O<inf>3</inf> glass that is important for numerous practical applications. The CDB measurements showed that the majority of positrons in the glass samples studied are annihilated in the vicinity of oxygen anions and iron-oxide containing glasses have lower concentration of oxygen-vacancy defects compared to the non-iron containing base glass.
Klasifikace
Druh
D - Stať ve sborníku
CEP obor
—
OECD FORD obor
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Návaznosti výsledku
Projekt
—
Návaznosti
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Ostatní
Rok uplatnění
2025
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název statě ve sborníku
Solid State Phenomena
ISBN
—
ISSN
1012-0394
e-ISSN
1662-9779
Počet stran výsledku
6
Strana od-do
119-124
Název nakladatele
Trans Tech Publications Ltd
Místo vydání
Baech, Switzerland.
Místo konání akce
Como, Italy
Datum konání akce
1. 9. 2024
Typ akce podle státní příslušnosti
WRD - Celosvětová akce
Kód UT WoS článku
—