Phase stability and structural transitions in compositionally complex LnMO(3) perovskites
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F21%3A00543953" target="_blank" >RIV/61389005:_____/21:00543953 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1016/j.jssc.2021.122213" target="_blank" >https://doi.org/10.1016/j.jssc.2021.122213</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jssc.2021.122213" target="_blank" >10.1016/j.jssc.2021.122213</a>
Alternative languages
Result language
angličtina
Original language name
Phase stability and structural transitions in compositionally complex LnMO(3) perovskites
Original language description
Entropy stabilised materials have possibilities for tailoring functionalities to overcome challenges in materials science. The concept of configurational entropy can also be applied to metal oxides, but it is unclear whether these could be considered as solid solutions in the case of perovskite-structured oxides and if the configurational entropy plays a stabilising role. In this study, compositionally complex perovskite oxides, LnMO(3) (Ln = La, Nd, Sm, Ca and Sr, M = Ti, Cr, Mn, Fe, Co, Ni, and Cu), are investigated for their phase stability and magnetic behaviour. Phase-pure samples were synthesised, and the room temperature structures were found to crystallise in either Pnma or R (3) over barc space groups, depending on the composition and the resulting tolerance factor, while the structural transition temperatures correlate with the pseudo cubic unit cell volume. The techniques used included diffraction with X-rays and neutrons, both ex- and in-situ, X-ray photoelectron spectroscopy, magnetometry as well as electron microscopy. Neutron diffraction studies on one sample reveal that no oxygen vacancies are found in the structure and that the magnetic properties are ferrimagnetic-like with magnetic moments mainly coupled antiferromagnetically along the crystallographic c-direction. X-ray photoelectron spectroscopy gave indications of the oxidation states of the constituting ions where several mixed oxidation states are observed in these valence-compensated perovskites.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
<a href="/en/project/LM2015056" target="_blank" >LM2015056: Center of Accelerators and Nuclear Analytical Methods</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Solid State Chemistry
ISSN
0022-4596
e-ISSN
1095-726X
Volume of the periodical
300
Issue of the periodical within the volume
AUG
Country of publishing house
US - UNITED STATES
Number of pages
10
Pages from-to
122213
UT code for WoS article
000661134000018
EID of the result in the Scopus database
2-s2.0-85107416420