Electrical transport and giant magnetoresistance in La0.75Sr0.25Mn1−xCrxO3 (0.15, 0.20 and 0.25) manganite oxide. Issue 12 (20th February 2015)

• Record Type: Journal Article
• Authors: Dhahri, Ah.; Jemmali, M.; Dhahri, E.; Hlil, E. K.
• Is Part Of: Dalton transactions. Volume 44:Issue 12(2015)
• Page Start: 5620
• Page End: 5627
• Publication Date: 2015-02-20
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c4dt03662j
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : Magnetoresistance plotted vs . temperature for the La0.75 Sr0.25 Mn0.75 Cr0.25 O3 sample under different magnetic fields. Abstract : We have investigated the influence of chromium (Cr) doping on the magneto-electrical properties of polycrystalline samples La0.75 Sr0.25 Mn1− x Cr x O3 (0.15 ≤ x ≤ 0.25), prepared by the sol–gel method. Comparison of experimental data with the theoretical models shows that in the metal-ferromagnetic region, the electrical behavior of the three samples is quite well described by a theory based on electron–electron, electron–phonon and electron–magnon scattering and Kondo-like spin dependent scattering. For the high temperature paramagnetic insulating regime, the adiabatic small polaron hopping (SPH) model is found to fit well the experimental curves.