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Low temperature synthesis of ferromagnetic (LaK)MnO3 from KCl, KBr and KI fluxes

Shivakumara, Chikkadasappa and Hegde, Manjanath Subraya and Subbanna, Gonur Nagarajarao (2001) Low temperature synthesis of ferromagnetic (LaK)MnO3 from KCl, KBr and KI fluxes. In: Solid State Sciences, 3 (1-2). pp. 43-48.

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Official URL: http://dx.doi.org/10.1016/S1293-2558(00)01116-X

Abstract

Potassium doped lanthanum manganites have been synthesized from KCl, KBr and KI fluxes at 900, 850 and 750 °C respectively. While all the flux-grown oxides are ferromagnetic metals (Tc=290–330 K), the oxides grown from KCl and KBr fluxes crystallize in the rhombohedral structure and that synthesized from KI flux adopts the cubic structure. The enhancement in Tc correlates with the increasing tendency of the flux to get oxidized and decreasing melting points of the flux. Nearly stoichiometric (LaK)MnO3 with 33 % of Mn4+ concentration could be prepared at temperature as low as 750 °C. Composition of all the phases have been obtained from the chemical analysis of the elements present.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: Lanthanum manganites;Flux synthesis;Rhombohedral structure; Ferromagnetic oxides.
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 10 Nov 2011 04:20
Last Modified: 10 Nov 2011 04:20
URI: http://eprints.iisc.ernet.in/id/eprint/39558

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