Transition from the diamagnetic insulator to ferromagnetic metal in La1-xSrxCoO3.
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F10%3A00353298" target="_blank" >RIV/68378271:_____/10:00353298 - 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
Transition from the diamagnetic insulator to ferromagnetic metal in La1-xSrxCoO3.
Original language description
We have analyzed, using the theoretical GGA+U calculations, different configurations of spin states (LS, IS and HS Co3+) and proposed a model that accounts for magnetic and electric transport properties of perovskite cobaltites upon doping by charge carriers. In particular, it appears that the compositional transition from the diamagnetic LS phase of LaCoO3 to the ferromagnetic metallic IS phase in La1-xSrxCoO3 (x > 0.2) involves the same mechanisms as the high-temperature transition in pure LaCoO3. Theprocess occurs gradually via a phase-separated state, where metallic IS domains stabilized through a charge transfer between Co4+ and Co3+ neighbors coexist with the Co4+ poor regions in the LS ground state (or, at higher temperatures, in mixed LS/HS state). This phase separation vanishes when doping in La1-xSrxCoO3 reaches x 0.2, and a uniform IS phase, analogous to that in pure LaCoO3 in the high-temperature limit, is established.
Czech name
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Czech description
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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
2010
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
322
Issue of the periodical within the volume
9-12
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
3
Pages from-to
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UT code for WoS article
000275746100049
EID of the result in the Scopus database
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