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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/7422

Title: Near room temperature magneto caloric effect in V doped La(0.67)Ca(0.33)MnO(3) ceramics
Authors: NISHA, P
SANTHOSH, PN
SURESH, KG
PAVITHRAN, C
VARMA, MR
Keywords: transport-properties
entropy change
magnetoresistance
transition
films
la0.7ca0.3mno3
manganites
mn
lamno3+delta
perovskites
Issue Date: 2009
Publisher: ELSEVIER SCIENCE SA
Citation: JOURNAL OF ALLOYS AND COMPOUNDS, 478(1-2), 566-571
Abstract: La(0.67)Ca(0.33)MnO(3) doped with different amounts of V, resulting in the series La(0.67)Ca(0.33)Mn(1-x)V(x)O(3) [x = 0.03, 0.06, 0.1, 0.15, 0.25, 0.5] was synthesized by conventional solid-state ceramics route. Heat treatment conditions during synthesis were optimized to have small changes in the Curie temperature (T(C)). The compounds with x > 0.06 were found to have the additional LaVO(4) phase. A quantitative analysis of the extra phase with increase in V doping was investigated by the Rietveld refinement of the X-ray diffraction patterns. Variation of magnetic and magnetocaloric properties at different temperatures and magnetic fields was studied. Magnetocaloric effect has been studied in terms of isothermal magnetic entropy change (Delta S(M)). Magnetization was found to change drastically at around 275 K and the isothermal magnetic entropy change was found to peak in the temperature range 265-275 K. With increase in V content, Delta S(M) initially shows a considerable increase and then a decrease at higher V concentrations. (C) 2008
URI: http://dx.doi.org/10.1016/j.jallcom.2008.11.091
http://dspace.library.iitb.ac.in/xmlui/handle/10054/7422
http://hdl.handle.net/10054/7422
ISSN: 0925-8388
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