Abstract
The M doped BaFe2O4 (M—Co, Ni and Mn) nanoparticles were synthesized through auto combustion method by using n-heptane as a surfactant. And also the weight percentage (wt%) of metals such as cobalt, nickel and manganese (10 wt%, 8 wt% and 6 wt%) in BaFe2O4 was optimized. The prominent orientation (212) and (311) of M doped BaFe2O4 is confirmed from XRD especially in 10 wt% of respective metals. The addition of metal doped in barium ferrite specific vibration on 770 and 445 cm−1 in FTIR spectra indicated the formation of M doped BaFe2O4. The influence of n-heptane as a surfactant on morphological change occurred in different metal doped was visualized from FESEM and TEM images. The different morphologies such as spherical, hexagonal platelets and small rectangular bar shaped were observed only by the inclusion of barium ferrite at surfactant medium. The analysis of EDX spectrum reflected the atomic percentage of elemental presence in the samples of M doped barium ferrite. Magnetic properties of these samples were studied by VSM. It revealed that 28.41 emu/g saturation magnetization (Ms) with 1655.64 Oe coercivity (Hc) and also induced ferromagnetic behaviour. The variation of dielectric constant indicated from dielectric study.
Highlights
Spinel ferrite is one of the types of complex oxides having general formula MFe2O4, where magnetization as 28.41 emu/g (Ms) represents metal cation
The FTIR spectra of Co has been taken from different weight percentages (10wt%, 8wt% and 6wt%) in barium ferrite nanoparticles
In samples (a2-a3) vibrational bands at 773 cm− 1 for Ba-O are observed. It is well matched with X-ray diffraction (XRD) pattern, because sample (a1) shows the Ba-O, Co-O and Fe-O vibrations as well as formation of Co doped BaFe2O4 exhibits in XRD
Summary
Spinel ferrite is one of the types of complex oxides having general formula MFe2O4, where M represents metal cation. Ba2+ as A sites are tetrahedral and Fe3+ as B sites are octahedral coordinated by oxygen atoms [4]. They can be effectively adjusted by using divalent ions such as Co, Ni, Mn, Zn, Ti and Sr [5,6,7]. Spinel ferrite has soft magnetic properties with high electrical resistivity. The other advantage of these materials is mainly due to its excellent chemical stability and high mechanical durability. These ferrites even promote some advantage for chemical resistance, electrical resistivity and strong magnetic field. There are several methods for synthesizing the magnetic spinel ferrite such as co-precipitation, solgel, auto-combustion method, electrochemical method, hydrothermal method and micro emulsion [8,9,10,11,12,13]
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