Jump to main content
Jump to site search

Issue 17, 2018
Previous Article Next Article

Sr5Os3O13: a mixed valence osmium(V,VI) layered perovskite variant exhibiting temperature dependent charge distribution

Author affiliations

Abstract

New Sr5Os3O13, as synthesized from binary constituents, exhibits several uncommon features. Its crystal structure is dominated by quasi-2D poly-oxoanions that correspond to unprecedented cutouts of the perovskite type of structure, where corner sharing (OsO6) octahedra aggregate to form terraced slabs. The Os5+/Os6+ mixed valence oxide displays a particular charge ordering scheme. One osmium atom (Os1) per formula unit is in the valence state of 5+ in the whole temperature range studied, while the two remaining sites (Os2A and Os2B) show full charge disorder at high temperatures, resulting in an average charge of 5.5+. The latter, however, apparently undergo a process of continuous charge ordering at cooling. Full charge order appears to be established concomitantly with a phase transition to an antiferromagnetically ordered state at T(Néel) = 170 K. This kind of temperature dependent continuous charge ordering is reflected by structural changes with temperature as well as by changes in paramagnetic response above T(Néel). Disentangling the intimate interplay between magnetic and charge ordering degrees of freedom will require applying sophisticated spectroscopy and (neutron) diffraction techniques.

Graphical abstract: Sr5Os3O13: a mixed valence osmium(v,vi) layered perovskite variant exhibiting temperature dependent charge distribution

Back to tab navigation

Supplementary files

Publication details

The article was received on 07 Feb 2018, accepted on 25 Mar 2018 and first published on 26 Mar 2018


Article type: Paper
DOI: 10.1039/C8DT00528A
Citation: Dalton Trans., 2018,47, 5968-5976
  • Open access: Creative Commons BY license
  •   Request permissions

    Sr5Os3O13: a mixed valence osmium(V,VI) layered perovskite variant exhibiting temperature dependent charge distribution

    S. A. Mohitkar, J. Nuss, H. A. Höppe, C. Felser and M. Jansen, Dalton Trans., 2018, 47, 5968
    DOI: 10.1039/C8DT00528A

    This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material.

    Reproduced material should be attributed as follows:

    • For reproduction of material from NJC:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC.
    • For reproduction of material from PCCP:
      [Original citation] - Published by the PCCP Owner Societies.
    • For reproduction of material from PPS:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
    • For reproduction of material from all other RSC journals:
      [Original citation] - Published by The Royal Society of Chemistry.

    Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.

Search articles by author

Spotlight

Advertisements