High resolution diffraction and small angle scattering neutron investigations of LaCo 0.5 Mn 0.5 O 3+ δ: effect of oxygen content

D. V. Karpinsky (), I. O. Troyanchuk, A. P. Sazonov, O. A. Savelieva and A. Heinemann

The European Physical Journal B: Condensed Matter and Complex Systems, 2007, vol. 60, issue 3, 273-279

Abstract: We have investigated LaCo 0.5 Mn 0.5 O 3+ δ compounds with different oxygen content by means of magnetization, high resolution and small-angle neutron diffraction measurements. Oxygen content decrease down to stoichiometric composition leads to an essential increase of T C and magnetic moment while Co/Mn ionic ordering degree is kept almost constant. It is assumed that upon oxygen reduction Co 3+ ions change their valence state down to 2+ one that leads to dominating of Co 2+ -Mn 4+ ferromagnetic interactions as well as T C increase. Magnetic properties can be explained in terms of coexistence of long-range ferromagnetic order and short-range clusters with antiferromagnetic interactions prevailing. Size distribution of the mentioned short-range magnetic inhomogeneities is rather mild within the samples but it is strongly temperature dependent. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2007

Keywords: 75.25.Ha; 74.62.Bf Effects of material synthesis; crystal structure; and chemical composition; 75.25.+z Spin arrangements in magnetically ordered materials (search for similar items in EconPapers)
Date: 2007
References: Add references at CitEc
Citations:

Downloads: (external link)
http://hdl.handle.net/10.1140/epjb/e2007-00349-2 (text/html)
Access to full text is restricted to subscribers.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:spr:eurphb:v:60:y:2007:i:3:p:273-279

Ordering information: This journal article can be ordered from
http://www.springer.com/economics/journal/10051

DOI: 10.1140/epjb/e2007-00349-2

Access Statistics for this article

The European Physical Journal B: Condensed Matter and Complex Systems is currently edited by P. Hänggi and Angel Rubio

More articles in The European Physical Journal B: Condensed Matter and Complex Systems from Springer, EDP Sciences
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().