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Electrical and magneto-transport properties of La 0.8Sr 0.2MnO 3

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dc.citedby0
dc.contributor.authorShilan S.T.en_US
dc.contributor.authorEwe L.S.en_US
dc.contributor.authorAbd-Shukor R.en_US
dc.contributor.authorid55503171100en_US
dc.contributor.authorid58032789200en_US
dc.contributor.authorid7004750914en_US
dc.date.accessioned2023-12-29T07:48:52Z
dc.date.available2023-12-29T07:48:52Z
dc.date.issued2011
dc.description.abstractThe effects of sintering temperature on the electrical and magneto-transport properties of La 0.8Sr 0.2 MnO 3 compounds prepared by employing a chemical co-precipitation route sintered at 1120�C, 1220�C and 1320�C are reported. The X-ray powder diffraction patterns for all samples can be indexed to the rhombohedra structure with R3C space group. The insulator-metal transition temperature remained nearly constant (291 K) for all samples. The magneto resistance (MR) values were found to decrease noticeably as the sintering temperature was increased from 1120�C to 1320�C. Above 0.3 T, the magneto resistance was influenced by T o values, which indicates the bending of Mn-O-Mn bond. The resistivity data were fitted with several equations in the metallic (ferromagnetic) region. In the insulating (paramagnetic) region, the variable range hopping and small polaron hopping models were used to compute the density of states at the Fermi level, N(E F), and activation energy (E a) of the electrons. The resistivities can be fitted well with ?-T 2 and ?-T 2.5 curves. The variable range hopping model and small polaron hopping model fitted very well at high temperature regions, indicating that small polaron hopping might be responsible for the conduction. La 0.8 Sr 0.2MnO 3 sintered at 1220�C demonstrated the highest MR of 6.5% in 1 T magnetic field. � 2011 World Scientific Publishing Company.en_US
dc.description.natureFinalen_US
dc.identifier.doi10.1142/S0217979211102095
dc.identifier.epage3833
dc.identifier.issue28
dc.identifier.scopus2-s2.0-84870062472
dc.identifier.spage3825
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84870062472&doi=10.1142%2fS0217979211102095&partnerID=40&md5=2d228a4f10c04b3f5dda6332475fec68
dc.identifier.urihttps://irepository.uniten.edu.my/handle/123456789/30523
dc.identifier.volume25
dc.pagecount8
dc.sourceScopus
dc.sourcetitleInternational Journal of Modern Physics B
dc.subjectgrain size
dc.subjectmagneto transport
dc.subjectmanganites
dc.subjectMetal-insulator transition temperature
dc.titleElectrical and magneto-transport properties of La 0.8Sr 0.2MnO 3en_US
dc.typeArticleen_US
dspace.entity.typePublication
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