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Magnetism of Ti4+ diluted manganites La1-xPbxMn1-yTiyO3 (y <= x)

Sahana, M and Dorr, K and Doerr, M and Eckert, D and Muller, KH and Nenkov, K and Schultz, L and Hegde, MS (2000) Magnetism of Ti4+ diluted manganites La1-xPbxMn1-yTiyO3 (y <= x). In: Journal of Magnetism and Magnetic Materials, 213 (3). pp. 253-261.

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Official URL: http://dx.doi.org/10.1016/S0304-8853(00)00024-X

Abstract

The effect of nonmagnetic Ti4+ substitution for Mn4+ on magnetic ordering of La1-xPbxMn1-yTiyO3 (x = 0.15,0.26, and 0.4; 0 less than or equal to y less than or equal to x )has been studied. The ferromagnetic transition temperature and the magnetization decrease with increasing amount of titanium. Complete substitution of Mn4+ by Ti4+, for x = y, excludes the Mn3+-O-Mn4+ double exchange. However, these compounds still show ferromagnetism if the dilution of the Mn sublattice by Ti is small enough (y less than or equal to 0.2). This ferromagnetism probably originates from a ferromagnetic Mn3+-O-Mn3+ superexchange. A thorough study of magnetic properties including AC magnetic susceptibility, magnetization, temperature dependence of coercivity and relaxation of remanent magnetization has been carried out and gives evidence of cluster spin glass behaviour for La0.6Pb0.4Mn0.6Ti0.4O3. (C) 2000 Elsevier Science B.V. All rights reserved.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier science.
Keywords: Manganites;B-site substitution;Magnetization;Relaxation of remanent magnetization;Cluster glass;Colossalmagnetoresistance
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 12 Aug 2010 10:01
Last Modified: 19 Sep 2010 06:14
URI: http://eprints.iisc.ernet.in/id/eprint/31293

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