Valence and spin states in perovskites LaCo0.95M0.05O3 (M = Mg, Ga, Ti)
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F08%3A00313174" target="_blank" >RIV/68378271:_____/08:00313174 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Valence and spin states in perovskites LaCo0.95M0.05O3 (M = Mg, Ga, Ti)
Original language description
The samples LaCoO3 with dilute substitutions on cobalt sites have been studied using the resistivity, thermopower and magnetic susceptibility measurements over the temperature range up to 900 K. The Co-site substitution does not affect the magnetic transition at 100 K and the onset of massive population of hole carriers at 500 K, characteristic for undoped LaCoO3. On the other hand, the lowtemperature transport and magnetism is markedly distinct for samples with extra charge on cobalt ions introduced bythe heterovalent dopants (Mg2+, Ti4+) compared to samples with minor non-stoichiometry (LaCoO3, Ga3+-doped sample). Magnetic properties suggest that these extra charges create thermally stable magnetic polarons of total S similar to 2?3. Common featuresof Co-site doped and La-site doped samples (La1-xSrxCoO3) are discussed.
Czech name
Valenční a spinové stavy v perovskitech LaCo0.95M0.05O3 (M = Mg, Ga, Ti)
Czech description
Substituce na poloze Co u vzorků LaCoO3 zachová magnetický přechod u 100 K a resistivní přechod okolo 500 K, charakteristické pro nedopovaný LaCoO3. Ale nízkoteplotní transportní a magnetické vlastnosti jsou velmi odlišné pro dopované a nedopované vzorky. Přidané náboje vytváří teplotně stabilní magnetické polarony.
Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Result continuities
Project
<a href="/en/project/IAA100100611" target="_blank" >IAA100100611: Magnetism and the insulator-metal transition in the Co3+/Co4+ perovskites.</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2008
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 Magnetism and Magnetic Materials
ISSN
0304-8853
e-ISSN
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Volume of the periodical
320
Issue of the periodical within the volume
14
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
4
Pages from-to
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UT code for WoS article
000255512600036
EID of the result in the Scopus database
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