Search results for "Double perovskite"

showing 3 items of 3 documents

Crystal Structure and Transport Properties of Sr<sub>2</sub>FeMoO<sub>6</sub> Thin Films

2001

MagnetizationMaterials scienceColossal magnetoresistanceCondensed matter physicsMechanics of MaterialsHall effectMechanical EngineeringGeneral Materials ScienceDouble perovskiteCrystal structureThin filmCondensed Matter PhysicsPerovskite (structure)Materials Science Forum
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Pulsed laser deposition of Sr2FeMoO6 thin films

2005

Abstract The effect of various deposition conditions and after-growth protocols on the magnetic and transport properties of Sr 2 FeMoO 6 films has been explored. It is found that the saturation magnetization and the magnetoresistance (MR) are dominated by the degree of cationic order, and the strain effects are clearly evidenced in a lower T C . The after-growth annealing of the films and the deposition of a buffer layer has been found to relax the film strains. This translates into a clear increase of the measured low-field magnetoresistance ratios.

Materials scienceColossal magnetoresistanceCondensed matter physicsMagnetoresistanceAnnealing (metallurgy)Cationic polymerizationDouble perovskiteThin filmCondensed Matter PhysicsElectronic Optical and Magnetic MaterialsPulsed laser depositionJournal of Magnetism and Magnetic Materials
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Tuning the Optical Absorption of Sn-, Ge-, and Zn-Substituted Cs2AgBiBr6 Double Perovskites: Structural and Electronic Effects

2021

Lead-free halide double perovskites (DPs) are highly tunable materials in terms of chemical composition and optical properties. One of the most widely reported DPs is Cs2AgBiBr6, which is envisaged as a promising absorber for photovoltaics. Nevertheless, its bandgap (around 1.9−2.3 eV) remains too large for common tandem solar cells. In this work, we report the mechanochemical synthesis of Sn-, Ge-, and Zn-substituted Cs2AgBiBr6 in powder form; their bandgaps reach 1.55, 1.80, and 2.02 eV, respectively. These differences are rationalized through density functional theory calculations, demonstrating combined electronic and structural (disorder) effects introduced by the divalent metal-cation…

Materials scienceGeneral Chemical EngineeringMaterials ChemistryElectronic effectAnalytical chemistryDouble perovskiteGeneral ChemistryAbsorption (electromagnetic radiation)MaterialsCèl·lules fotoelèctriquesChemistry of Materials
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