Effects of A-site substitution on the structure and magnetic properties of Bi(0.15)Sr(0.85-y)Ae(y)Co(1-x)Fe(x)O(3-delta) perovskites

Eriksson, Annika,1975Chalmers tekniska högskola,Chalmers University of Technology (författare)

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 = 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. (C) 2009 Elsevier Masson SAS. All rights reserved.

Tran, T.Göteborgs universitet,University of Gothenburg (författare)
Saxin, S.Göteborgs universitet,University of Gothenburg (författare)
Svensson, G.Stockholms universitet,Stockholm University (författare)
Svedlindh, P.Uppsala universitet,Uppsala University (författare)
Eriksson, Sten,1958Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)stene (författare)
Knee, C. S.Göteborgs universitet,University of Gothenburg (författare)
Chalmers tekniska högskolaGöteborgs universitet (creator_code:org_t)

Av författaren/redakt...: Eriksson, Annika ...; Tran, T.; Saxin, S.; Svensson, G.; Svedlindh, P.; Eriksson, Sten, ...; visa fler...; Knee, C. S.; visa färre...

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