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Temperature evolution of structure and magnetic properties in the perovskite Sr2MnSbO6
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Materials Chemistry, Structural Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Materials Chemistry, Structural Chemistry. (strukturkemi)
2009 (English)In: Materials research bulletin, ISSN 0025-5408, E-ISSN 1873-4227, Vol. 44, no 4, 822-830 p.Article in journal (Refereed) Published
Abstract [en]

The structural and magnetic properties of the perovskite Sr2MnSbO6 have been studied. Combining neutron and X-ray powder diffraction data, the temperature evolution of the structural parameters was investigated with the Rietveld method between 2 and 1000 K. The crystal structure is tetragonal (space group I4/m) within the temperature interval of 2–750 K and cubic (space group Fm-3m) above 750 K. Both octahedral B-site positions were found to be partially occupied by Mn and Sb, but with different Mn/Sb ratios. The magnetic susceptibilities showed irreversibility between field cooled and zero-field cooled (ZFC) conditions and spin glass like magnetic dynamics including aging and memory phenomena at temperatures below 30 K; all appearing well above a broad maximum at 13 K in the ZFC susceptibility curves. This suggests that the material reaches an unconventional spin-glass state at low temperatures, possibly arising from a competitive situation between the double exchange (ferromagnetism) and the super-exchange (antiferromagnetism). Neutron diffraction patterns showed no evidence of a long-range magnetic ordering at 2 K which is consistent with spin glass behavior. The factors governing the observed structural and magnetic properties of Sr2MnSbO6 are discussed and compared with those of other quaternary Mn- and Sb-containing perovskites. Graphs of the temperature of magnetic phase transitions as functions of the cation size were constructed and are discussed for the AB3+1/2B5+1/2O3 series with isomorphous substitution of B3+ and B5+ cations. Possible influence of the A-cation sublattice on magnetic properties is also shortly considered.

Place, publisher, year, edition, pages
Elsevier Ltd , 2009. Vol. 44, no 4, 822-830 p.
Keyword [en]
Neutron scattering, Crystal structure, Ferroelectricity, Magnetic properties, Phase transitions
National Category
Chemical Sciences Engineering and Technology
Research subject
Inorganic Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-121029DOI: 10.1016/j.materresbull.2008.09.017ISI: 000264421200021OAI: oai:DiVA.org:uu-121029DiVA: diva2:304410
Available from: 2010-03-18 Created: 2010-03-18 Last updated: 2017-12-12Bibliographically approved

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Publisher's full texthttp://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TXC-4TJTXF1-1&_user=651519&_coverDate=04%2F02%2F2009&_alid=1255382263&_rdoc=4&_fmt=high&_orig=search&_cdi=5587&_sort=r&_docanchor=&view=c&_ct=28&_acct=C000035158&_version=1&_urlVersion=0&_userid=651519&md5=e316e95e7b7e6e8d9e9e5f5cbe93e5f8

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Nordblad, Per

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