Yadav, Akash and Shah, Jyoti and Tripathi, Rahul and Kotnala, R. K. (2017) Room temperature metal-insulator transition observed in Pb substituted lanthanum manganite. Ceramics International, 43 (13). pp. 10508-10514. ISSN 0272-8842

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Abstract

Structural, magnetic and transport property of Pb substituted LaMnO3 (La(1-x)Pbs(x)MnO(3); x=0.1, 0.2, 0.3, 0.4, 0.5) prepared by solid state reaction route have been studied systematically. X-ray diffraction,SEM, VSM,magneto-transport measurements were carried out on prepared samples. All the samples below x=0.4 composition were crystallized into single phase with R-3C space group of trigonal crystal class. The explored physical properties like magnetoresistance (MR), resistivity, metal-insulator transition temperature (T-p), magnetization (MW)and Curie temp. (T-c) varies with Pb concentration. Higher T-p (298 K) and minimum resistivity was recorded for x=0.3 sample whereas no distinct peak corresponding to metal-insulator transition was observed for La-0.5Pb0.5MnO3. Appreciable magnetoresistance (MR%) values were obtained for all the samples at 300 K.X-ray photoelectron spectroscopy (XPS) confirms the +2 oxidation state of Pb in all substituted samples. Fine tuning of Tc could be achieved by varying Pb concentration in substituted LaMnO(3)samples, hence, it can find application in the field of cancer treatment i.e. Magnetic Hyperthermia.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M\S Elsevier.
Subjects:	Materials Science
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	20 Feb 2019 06:42
Last Modified:	20 Feb 2019 06:42
URI:	http://npl.csircentral.net/id/eprint/2842

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