Magnetic resonance study of phases in FeVO4–Co3V2O8 system

✍ Scribed by N. Guskos; G. Zolnierkiewicz; J. Typek; A. Blonska-Tabero

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 884 KB
• Volume: 406
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/j.physb.2011.03.023

✦ Synopsis

Multicomponent vanadates Co 3 þ x Fe 4 À x V 6 O 24 have been synthesized using the solid state reaction method from Co 3 V 2 O 8 and FeVO 4 .oxides. The electron paramagnetic resonance/ferromagnetic resonance (EPR/FMR) spectra of 20 samples containing solid state phases formed in the FeVO 4 -Co 3 V 2 O 8 system have been recorded at room temperature. The howardevansite structure (H-type phase) is produced, which corresponds to the Co 2.616 Fe 4.256 V 6 O 24 formula while a homogeneity range of lyonsite (L-type phase) type structure could be described by the Co 3 þ 1.5x Fe 4 À x V 6 O 24 formula (0.476o x o 1.667). Considering the values of g-factor and linewidth of each registered spectrum the existence of three types of magnetic centers was inferred and correlated with phases detected by XRD method.