Search results for "Manganites"

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Structural, magnetic, dielectric and mechanical properties of (Ba,Sr)MnO3 ceramics

2017

The authors acknowledge the CPU time allocation at Academic Computer Centre CYFRONET AGH in Cracow. This work was supported in part by PL-Grid Infrastructure and the European Regional Development Fund under the Infrastructure and Environment Programme [grant number UDA-POIS.13.01-023/09-00]. The research was partially carried out with the equipment purchased thanks to the financial support of the European Regional Development Fund in the framework of the Polish Innovation Economy Operational Program (contract no. POIG.02.01.00-12-023/08). L. Vasylechko acknowledges partial support of the Ukrainian Ministry of Education and Sciences under the Projects ?RZE?, ?KMON?, and ICDD Grant-in-Aid pro…

Phase transitionMaterials scienceMultiferroicsEnthalpyAnalytical chemistryAb initioFOS: Physical sciences02 engineering and technologyDielectricActivation energy01 natural sciences7. Clean energyThermal expansionDSCsymbols.namesakeNuclear magnetic resonanceManganites0103 physical sciencesMesoscale and Nanoscale Physics (cond-mat.mes-hall)Materials Chemistry:NATURAL SCIENCES:Physics [Research Subject Categories]Ceramic010306 general physicsArrhenius equationCondensed Matter - Materials ScienceCondensed Matter - Mesoscale and Nanoscale PhysicsSIESTAMaterials Science (cond-mat.mtrl-sci)021001 nanoscience & nanotechnologyFTIRvisual_artCeramics and Compositessymbolsvisual_art.visual_art_medium0210 nano-technologyJournal of the European Ceramic Society
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Influence of Mn site doping on electrical resistivity of polycrystalline La1-yAyMn1-xBxO3 (A=Ba, Sr; B=Cu, Cr, Co) Manganites

2008

We have the measured electrical resistivity of La1-yBayMn1-xCuxO3 (0.17?y?0.30; 0.04?x?0.10), La1-ySryMn1-xCrxO3 and La1-ySryMn1-xCoxO3 (0.270?y?0.294; 0.02?x?0.10) polycrystalline samples in the 25-325 K temperature range. The increase of Mn site doping concentration leads to an increase of the electrical resistivity of the samples and the appearance of a ?double-peak? structure in the electrical resistivity versus temperature graphs. The first peak represents the insulator-metal transition in vicinity of the paramagnetic-ferromagnetic transition (TC). We have found that the intensity of the second peak increases with an increase of concentration of Mn substituents, due to the hole scatter…

colossal magnetoresistanceMaterials scienceRandom potentialColossal magnetoresistanceCondensed matter physicsScatteringDopingAnalytical chemistryMetals and AlloysAtmospheric temperature rangelcsh:Chemical technologyCondensed Matter PhysicsImpurityElectrical resistivity and conductivityManganitesMaterials ChemistryCeramics and Compositeslcsh:TP1-1185Crystalliteelectrical resistivityScience of Sintering
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