uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Effets of A-site substitution on the structure and magnetic properties of Bi0.15Sr0.85-yAeyCo1-xFexO3-o
Show others and affiliations
2009 (English)In: Solid State Sciences, ISSN 1293-2558, E-ISSN 1873-3085, Vol. 11, no 11, 1945-1954 p.Article in journal (Refereed) Published
Abstract [en]

The effects of partial substitution of Sr2+ by Ca2+ and Ba2+ on the   A-site of oxygen-deficient perovskites,   Bi(0.15)Sr(0.85-y)Ae(y)Co(1-x)FeO(3-delta), where y = 0.28 for Ae = Ba   and y = 0.17 for Ae = Ca, and 0.0 <= x <= 1.0, have been investigated.   The differing ionic size of the Ca2+ and Ba2+ cations influences both   the crystal structure and the properties of the materials. The smaller   Ca2+ cation favoured formation of an oxygen vacancy ordered perovskite   superstructure (14/mmm, a = 2ap, c = 4a(p)), meanwhile the presence of   the larger Ba2+ cation promoted a disordered simple cubic structure (Pm   (3) over barm, a = ap) that was also found for all Fe containing   samples, i.e. x >= 0.25. The samples were studied with PXRD, NPD, TGA,   electron microscopy and magnetic susceptibility measurements. All   as-prepared samples exhibited long range G-type antiferromagnetic   ordering. The effect of oxygen annealing was dramatic for the   Bi0.15Sr0.68Ca0.17Co1-xFexO3-delta series, with a disappearance of   magnetic order for x >= 0.25 linked to increasing spin-glass   properties. The oxygen content of the   Bi0.15Sr0.57Ba0.28Co1-xFexO3-delta as-prepared materials was generally   higher than their Ca substituted counterparts, and the long range   antiferromagnetic order was more resistant to oxygen annealing.

Place, publisher, year, edition, pages
2009. Vol. 11, no 11, 1945-1954 p.
Keyword [en]
Oxygen vacancies, Neutron diffraction, Perovskite supercell, Antiferromagnetic, Spin-glass
National Category
Engineering and Technology
Research subject
Solid State Physics
URN: urn:nbn:se:uu:diva-122296DOI: 10.1016/j.solidstatesciences.2009.07.008ISI: 000272116800018OAI: oai:DiVA.org:uu-122296DiVA: diva2:309620
Available from: 2010-04-07 Created: 2010-04-07 Last updated: 2016-04-14Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Svedlindh, Peter
By organisation
Solid State Physics
In the same journal
Solid State Sciences
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 408 hits
ReferencesLink to record
Permanent link

Direct link