Evolution of the microstructure and its influence on the magnetic properties of aerosol synthesized BaFe[sub 12]O[sub 19] particles
- Univ. Complutense, Madrid (Spain)
- INPG, Martin d'Heres (France)
- CNRS, Grenoble (France)
Hexagonal ferrites of which the prototype is BaFe[sub 12]O[sub 19] are well known not only as permanent magnets, but also as emerging magnetic recording media and as potential magneto-optical devices. The magnetic properties are strongly dependent on preparation method. So considerable efforts have been devoted to preparing pure and doped BaFe[sub 12]O[sub 19] fine particles, smaller than 1 [mu]m, to be used as magnetic recording media. Small BaFe[sub 12]O[sub 19] particles have been synthesized from an aqueous solution of barium and iron nitrates by an aerosol synthesis technique. Starting hollow spherical particles were annealed under several conditions. Hexagonal-like platelets were obtained at the final stage of a sintering process which has been followed by X-ray diffraction and scanning electron microscopy. The influence of the microstructure evolution on the magnetic properties is discussed.
- OSTI ID:
- 6837260
- Journal Information:
- Journal of Solid State Chemistry; (United States), Journal Name: Journal of Solid State Chemistry; (United States) Vol. 101:2; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360601 -- Other Materials-- Preparation & Manufacture
360606* -- Other Materials-- Physical Properties-- (1992-)
AEROSOLS
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHEMICAL PREPARATION
CHEMICAL REACTIONS
COHERENT SCATTERING
COLLOIDS
CRYSTAL STRUCTURE
DECOMPOSITION
DIFFRACTION
DISPERSIONS
ELECTRON MICROSCOPY
FABRICATION
FERRIMAGNETIC MATERIALS
FERRITES
IRON COMPOUNDS
MAGNETIC MATERIALS
MAGNETIC PROPERTIES
MATERIALS
MICROSCOPY
MICROSTRUCTURE
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PYROLYSIS
SAMPLE PREPARATION
SCANNING ELECTRON MICROSCOPY
SCATTERING
SINTERING
SOLS
SYNTHESIS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION