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On the physical properties of Sr.sub.1-x./sub.Na.sub.x./sub.RuO.sub.3./sub. (x = 0 - 0.19)
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SYSNO ASEP 0352057 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title On the physical properties of Sr1-xNaxRuO3 (x = 0 - 0.19) Author(s) Tomeš, P. (CH)
Knížek, Karel (FZU-D) RID, ORCID
Weidenkaff, A. (CH)
Hejtmánek, Jiří (FZU-D) RID, ORCIDSource Title Solid State Sciences. - : Elsevier - ISSN 1293-2558
Roč. 12, č. 7 (2010), s. 1112-1120Number of pages 9 s. Language eng - English Country FR - France Keywords perovskite SrRuO3 ; magnetism ; heat capacity ; weak localization Subject RIV BM - Solid Matter Physics ; Magnetism CEZ AV0Z10100521 - FZU-D (2005-2011) UT WOS 000280381200014 EID SCOPUS 77953809026 DOI 10.1016/j.solidstatesciences.2010.04.011 Annotation The metallic ferromagnetic perovskite SrRuO3 (TC~160K) belongs to the materials with strongly correlated electrons. Nonetheless a simple ferromagnetism associated with isotropic interactions of low spin Ru4+ ions local moments is too simple to explain the complex interplay between charge carriers and magnetic interactions. In order to probe the robustness of the metallic ferromagnetism against electron occupation of 4d Ru orbital we prepared and characterized polycrystalline Sr1-xNaxRuO3 (x=0.0–0.19) ceramics. The substitution of Sr2+ by Na1+ induces the decrease of the Curie temperature and spin-wave stiffness, which was determined independently from magnetic and specific heat data. On the other hand the effective paramagnetic moment remains essentially unchanged. All compounds are metallic in a sense of electrical resistivity and thermopower temperature dependence. The metallic nature of the samples is corroborated by Pauli paramagnetism and high Sommerfeld coefficient gamma. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2011
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