Phase Transition and Structural Defects in Complex Iron-Containing Oxide Glasses Probed By Positron Annihilation
The result's identifiers
Result code in 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>
Result on the web
<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>
Alternative languages
Result language
angličtina
Original language name
Phase Transition and Structural Defects in Complex Iron-Containing Oxide Glasses Probed By Positron Annihilation
Original language description
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.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Solid State Phenomena
ISBN
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ISSN
1012-0394
e-ISSN
1662-9779
Number of pages
6
Pages from-to
119-124
Publisher name
Trans Tech Publications Ltd
Place of publication
Baech, Switzerland.
Event location
Como, Italy
Event date
Sep 1, 2024
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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