Synthesis, Characterization, and Magnetic Properties of A{sub 2}Co{sub 2}Fe(VO{sub 4}){sub 3} (A = Ag or Na) Alluaudite-Type Vanadates
- Mohammed V University in Rabat, Laboratoire de Chimie Appliquée des Matériaux, Centre des Sciences des Matériaux, Faculty of Sciences (Morocco)
- Université de Picardie Jules Verne, Laboratoire de Physique de La Matière Condensée (LPMC) (France)
- Université Sultan Moulay Slimane, Laboratoire de Physique des Matériaux, Faculté des Sciences et Techniques (Morocco)
We successfully synthesized the polycrystalline form of vanadates A{sub 2}Co{sub 2}Fe(VO{sub 4}){sub 3} (A = Ag or Na) using sol–gel method. Powder X-ray diffraction analysis allowed the identification of the alluaudite-type vanadate structure. The morphology and the elemental composition of the synthesized powders were analyzed by scanning electron microscopy (SEM) and energy-dispersive X-ray spectrometer (EDS). The two vanadates A{sub 2}Co{sub 2}Fe(VO{sub 4}){sub 3} (A = Ag or Na) were further characterized by infrared and Raman spectroscopies to get complementary structural information. The infrared and Raman spectroscopy-observed bands were assigned to VO{sub 4}{sup 3−} vibration modes. The room temperature {sup 57}Fe Mössbauer spectroscopy confirmed the +III oxidation state of iron. Magnetic properties of these vanadates were investigated. The magnetic susceptibility data reveal that the predominant interactions in these vanadates are antiferromagnetic with a Curie−Weiss constant of θ = − 125.6 K for Na{sub 2}Co{sub 2}Fe(VO{sub 4}){sub 3} and θ = − 104.5 K for Ag{sub 2}Co{sub 2}Fe(VO{sub 4}){sub 3}. The magnetic interactions in these vanadates were discussed according to semiempirical Goodenough–Kanamori–Anderson rules (GKA).
- OSTI ID:
- 22922966
- Journal Information:
- Journal of Superconductivity and Novel Magnetism, Journal Name: Journal of Superconductivity and Novel Magnetism Journal Issue: 8 Vol. 32; ISSN 1557-1939
- Country of Publication:
- United States
- Language:
- English
Similar Records
A new high voltage alluaudite sodium battery insertion material
Crystal chemistry of KCuMn{sub 3}(VO{sub 4}){sub 3} in the context of detailed systematics of the alluaudite family
Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTIFERROMAGNETISM
COBALT COMPOUNDS
IRON 57
IRON COMPOUNDS
MAGNETIC PROPERTIES
MOESSBAUER SPECTROMETERS
OSCILLATION MODES
POLYCRYSTALS
RAMAN SPECTROSCOPY
SCANNING ELECTRON MICROSCOPY
SILVER COMPOUNDS
SODIUM COMPOUNDS
SOL-GEL PROCESS
SYNTHESIS
VANADATES
X-RAY DIFFRACTION
X-RAY SPECTROMETERS