The inter-grain extrinsic magnetoresistance (eMR) observed in polycrystalline perovskite manganites has attracted attention recently. Previous efforts aimed at eMR enhancement have concentrated on grain boundary (GB) modification, mainly by insulator doping. In this paper, however, we report our investigations on the doping effect of a metal, Ag, on the eMR phenomenon. La2/3Sr1/3MnO3 (LSMO) thi...

In this article, we report our investigations on the doping effect metallic Ag on the intergrain magnetoresistance phenomenon. La2/3Sr1/3MnO3 ~LSMO! thin films with Ag doping were prepared on ~001! LaAlO3 at different substrate temperatures (Ts) by the dual-beam pulsed-laser deposition technique. Grown at Ts5750 °C, the films are perfectly epitaxial with their c axis perpendicular to the film s...

We report on the use of surface-sensitive techniques (x-ray absorption spectroscopy and x-ray magnetic circular dichroism) to investigate interfacial effects in sputtered manganite thin films, La2/3Ca1/3MnO3 (LCMO) and La2/3Sr1/3MnO3 (LSMO), with different capping layers [MgO, LaAlO3 (LAO), SrTiO3 (STO), NdGaO3 (NGO), and Au]. To ensure surface sensitivity, data were acquired by using the total...

A range of lanthanum strontium manganates (La1−xSrxMnO3–LSMO) where 0 ≤ x < 0.4 were prepared using a modified peroxide sol–gel synthesis method. The magnetic nanoparticle (MNP) clusters obtained for each of the materials were characterised using scanning electron microscopy (SEM), X-ray powder diffraction (XRD) and infra-red (IR) spectroscopy in order to confirm the crystalline phases, crystal...

For the widespread use of thermoelectric materials, it is necessary to reduce their cost, simplify technology and increase figure merit, which highly dependent on Seebeck coefficient. Therefore, one promising directions search for composites effective converters. In our article, three-component consisting a conductive component La0.7Sr0.3MnO3, (LSMO), dielectric components: mixture CuO oxides l...

La0.7Sr0.3MnO3 (LSMO) and Nd0.7Sr0.3MnO3 (NSMO) possess excellent colossal magnetoresistance (CMR). However, research work on the neodymium-based system is limited to date. A comparative study between LSMO NSMO prepared by sol–gel solid-state reaction methods was undertaken assess their structural, microstructural, magnetic, electrical, magneto-transport properties. X-ray diffraction structure ...