Microwave-Assisted Synthesis, Microstructure, and Magnetic Properties of Rare-Earth Cobaltites.
Julia Gutiérrez SeijasJesús Prado-GonjalDavid ÁvilaIan TerryEmilio MoránRainer SchmidtPublished in: Inorganic chemistry (2016)
The series of perovskite rare-earth (RE) doped cobaltites (RE)CoO3 (RE = La-Dy) was prepared by microwave-assisted synthesis. The crystal structure undergoes a change of symmetry depending on the size of the RE cation. LaCoO3 is rhombohedral, S.G. R3̅c (No. 167), while, for the rest of the RE series (Pr-Dy), the symmetry is orthorhombic, S.G. Pnma (No. 62). The crystal structure obtained by X-ray diffraction was confirmed by high-resolution transmission electron microscopy, which yielded a good match between experimental and simulated images. It is further shown that the well-known magnetism in LaCoO3, which involves a thermally induced Co3+ (d6) low spin to intermediate or high spin state transition, is strongly modified by the RE cation, and a rich variety of magnetic order has been detected across the series.
Keyphrases
- crystal structure
- electron microscopy
- single molecule
- high resolution
- room temperature
- ionic liquid
- molecularly imprinted
- density functional theory
- deep learning
- quantum dots
- high glucose
- diabetic rats
- convolutional neural network
- mass spectrometry
- optical coherence tomography
- magnetic resonance imaging
- machine learning
- magnetic resonance
- computed tomography
- drug induced
- highly efficient
- transition metal
- molecular dynamics
- solid phase extraction
- solar cells
- tandem mass spectrometry
- liquid chromatography