Journal
JOURNAL OF MOLECULAR STRUCTURE
Volume 1221, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.molstruc.2020.128859
Keywords
Li-Co Spinel ferrites; XRD; FTIR; Dielectric parameters; Magnetic properties; Recording media applications
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Funding
- Research Center of the Female Scientific and Medical Colleges, King Saud University
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Bismuth (Bi) substituted lithium-cobalt ferrites with compositions LiCo0.5BixFe2-xO4 (0.0 <= x <= 0.4) were synthesized via micro emulsion method. The spinel structure was confirmed by XRD analysis. Lattice constant and X-ray density were increased from 8.384 angstrom to 8.397 angstrom and 4.78-6.13 (gm/cm(3)) respectively with the increase of bismuth contents. FTIR spectra of bismuth substituted LiCo0.5Fe2O4 ferrites indicated that tetrahedral bands were in the range 500-600 cm(-1) which revealed the spinel structure of synthesized ferrites. Saturation magnetization (M-s) increased from 2.79 to 14.95 (emu/g) with the substitution of bismuth ions. The frequency dependent dielectric parameters i.e dielectric constant (epsilon') and dielectric loss (epsilon '') were elucidated in the frequency range of 1 MHz - 3 GHz. The value of epsilon' and epsilon '' decreases with the increase of frequency. The increase in the value of saturation magnetization and decrease in the value of coercivity suggested that bismuth substituted LiCo0.5Fe2O4 ferrites might be potential candidate for high density recording media applications. (C) 2020 Elsevier B.V. All rights reserved.
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