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Magnetic ground state and the spin-state transitions in YBaCo.sub.2./sub.O.sub.5.5./sub..
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SYSNO ASEP 0332014 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Magnetic ground state and the spin-state transitions in YBaCo2O5.5. Title Magnetic ground state and the spin-state transitions in YBaCo2O5.5. Author(s) Kozlenko, D. P. (RU)
Jirák, Zdeněk (FZU-D) RID, ORCID, SAI
Golosova, N.O. (RU)
Savenko, B. N. (RU)Source Title European Physical Journal B. - : Springer - ISSN 1434-6028
Roč. 70, č. 3 (2009), 327-334Number of pages 8 s. Language eng - English Country DE - Germany Keywords spin arrangements in magnetically ordered materials ; neutron diffraction Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects IAA100100611 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z10100521 - FZU-D (2005-2011) UT WOS 000269211000004 DOI 10.1140/epjb/e2009-00228-x Annotation The crystal and magnetic structure of the perovskite-like, oxygen deficient cobalt oxide YBaCo2O5.5 has been studied by means of neutron and X-ray diffraction in the 10–300 K temperature range. The magnetic ground state is characterized by a coexistence of two distinct antiferromagnetic phases. In the first one, the ionic moments of high-spin Co3+ ions in the pyramidal sites are ordered in a spiral arrangement, while octahedral sites are non-magnetic due to presence of low-spin Co3+ ions. The arrangement in the second phase is collinear of the G-type, with non-zero moments both in pyramidal (high-spin Co3+ ions) and octahedral sites (presumably a mixture of the low- and high-spin states). Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2010
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