About: Valence and spin states in perovskites LaCo0.95M0.05O3 (M = Mg, Ga, Ti)

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About: Valence and spin states in perovskites LaCo0.95M0.05O3 (M = Mg, Ga, Ti) Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
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 by the 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 features of Co-site doped and La-site doped samples (La1-xSrxCoO3) are discussed. 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 by the 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 features of Co-site doped and La-site doped samples (La1-xSrxCoO3) are discussed. (en) 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. (cs)
Title	Valence and spin states in perovskites LaCo0.95M0.05O3 (M = Mg, Ga, Ti) Valenční a spinové stavy v perovskitech LaCo0.95M0.05O3 (M = Mg, Ga, Ti) (cs) Valence and spin states in perovskites LaCo0.95M0.05O3 (M = Mg, Ga, Ti) (en)
skos:prefLabel	Valence and spin states in perovskites LaCo0.95M0.05O3 (M = Mg, Ga, Ti) Valenční a spinové stavy v perovskitech LaCo0.95M0.05O3 (M = Mg, Ga, Ti) (cs) Valence and spin states in perovskites LaCo0.95M0.05O3 (M = Mg, Ga, Ti) (en)
skos:notation	RIV/68378271:_____/08:00313174!RIV09-AV0-68378271
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(IAA100100611), Z(AV0Z10100521)
http://linked.open...iv/cisloPeriodika	14
http://linked.open...vai/riv/dodaniDat	2009
http://linked.open...aciTvurceVysledku	Knížek, Karel Maryško, Miroslav Veverka, Miroslav Jirák, Zdeněk Hejtmánek, Jiří
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Fyzikální ústav AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	402207
http://linked.open...ai/riv/idVysledku	RIV/68378271:_____/08:00313174
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	transition metal oxide; spin-state transition; electrical resistivity; thermopower (en)
http://linked.open.../riv/klicoveSlovo	spin-state transition electrical resistivity transition metal oxide thermopower
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[7EBB2E7DDF85]
http://linked.open...i/riv/nazevZdroje	Journal of Magnetism and Magnetic Materials
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	5 (xsd:int)
http://linked.open...cetTvurcuVysledku	6 (xsd:int)
http://linked.open...vavai/riv/projekt	Magnetism and the insulator-metal transition in the Co3+/Co4+ perovskites.
http://linked.open...UplatneniVysledku	2008
http://linked.open...v/svazekPeriodika	320
http://linked.open...iv/tvurceVysledku	Knížek, Karel Jirák, Zdeněk Maryško, Miroslav Veverka, Miroslav Hejtmánek, Jiří Autret, C.
http://linked.open...ain/vavai/riv/wos	000255512600036
http://linked.open...n/vavai/riv/zamer	Physics and technology of nanostructures, surfaces and thin films
issn	0304-8853
number of pages	4 (xsd:int)
is http://linked.open...avai/riv/vysledek of	Valence and spin states in perovskites LaCo0.95M0.05O3 (M = Mg, Ga, Ti) Valence and spin states in perovskites LaCo0.95M0.05O3 (M = Mg, Ga, Ti) Valence and spin states in perovskites LaCo0.95M0.05O3 (M = Mg, Ga, Ti) Valence and spin states in perovskites LaCo0.95M0.05O3 (M = Mg, Ga, Ti)

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