Magneto-conductive mechanisms in the La-site doped double-layered La1.4Ca1.6Mn2O7 manganites

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dc.authorid0000-0002-7280-6754en_US
dc.authorid0000-0001-6042-054Xen_US
dc.authorid0000-0003-4795-9182en_US
dc.authorid0000-0002-3944-0367
dc.authorid0000-0002-3133-5693
dc.authorid0000-0001-7066-1566
dc.contributor.authorMahamdioua, Nabil
dc.contributor.authorAmira, Abderrezak
dc.contributor.authorBoudjadja, Yazıd
dc.contributor.authorSaoudel, Abdelmalek
dc.contributor.authorAltıntaş, Sevgi Polat
dc.contributor.authorVarilci, Ahmet
dc.contributor.authorTerzioğlu, Cabir
dc.date.accessioned2021-06-23T19:42:55Z
dc.date.available2021-06-23T19:42:55Z
dc.date.issued2016
dc.departmentBAİBÜ, Fen Edebiyat Fakültesi, Fizik Bölümüen_US
dc.description.abstractMagneto-conductive mechanisms and properties of La1.2Re0.2Ca1.6Mn2O7 (Re = La, Pr, Y, Gd and Eu) have been investigated. In the low temperature range, combining residual resistivity, weak localization effect, electron electron and electron phonon interactions in a model, fit well the resistivity curves of undoped, Pr-doped and Y-doped samples. The Gd-doped and Eu-doped ones require the introduction of the small polaron metallic conduction. In the high temperature range, 3D-Mott's variable range hopping (3D-VRH) is the best model to fit resistivity of the undoped, Pr-doped and Y-doped samples, while Effros-Shklovskii model (ES-VRH) is the best one for Gd-doped and Eu-doped samples. In the entire temperature range, the percolation model fit well the resistivity. Using 3D-VRH model, the density of state (DOS) decreases with doping by Gd and Eu, whereas mean hopping distance R-h(T) and mean hopping energy E-h(T) increase. This may explain the resistivity increase and the crossover to the ES-VRH model. Values of R-h(T) vary between 1.811 and 1.030 nm, which allow us to suggest 3D-VRH as the best model fitting current results. E-h(T) values range from 0.1157 to 0.2635 eV. The DOS increases as increasing magnetic field while R-h(T) and E-h(T) decrease, which is in agreement with the observed decrease of resistivity.en_US
dc.identifier.doi10.1016/j.physb.2016.07.011
dc.identifier.endpage84en_US
dc.identifier.issn0921-4526
dc.identifier.issn1873-2135
dc.identifier.startpage77en_US
dc.identifier.urihttps://doi.org/10.1016/j.physb.2016.07.011
dc.identifier.urihttps://hdl.handle.net/20.500.12491/8641
dc.identifier.volume500en_US
dc.identifier.wosWOS:000384020000014en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.institutionauthorAltıntaş, Sevgi Polat
dc.institutionauthorVarilci, Ahmet
dc.institutionauthorTerzioğlu, Cabir
dc.language.isoenen_US
dc.publisherElsevier Science Bven_US
dc.relation.ispartofPhysica B-Condensed Matteren_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectDouble Layered Manganiteen_US
dc.subjectHopping Mechanismsen_US
dc.subjectDensity of Stateen_US
dc.subjectMean Hopping Energyen_US
dc.subjectMean Hopping Distanceen_US
dc.titleMagneto-conductive mechanisms in the La-site doped double-layered La1.4Ca1.6Mn2O7 manganitesen_US
dc.typeArticleen_US

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