Modulation of physico-chemical, magnetic, microwave and electromagnetic properties of nanocrystalline strontium hexaferrite by Co-Zr doping synthesized using citrate precursor sol-gel method

Kaur, Prabhjyot ; Chawla, S. K. ; Meena, S. S. ; Yusuf, S. M. ; Pubby, Kunal ; Narang, S. Bindra (2017) Modulation of physico-chemical, magnetic, microwave and electromagnetic properties of nanocrystalline strontium hexaferrite by Co-Zr doping synthesized using citrate precursor sol-gel method Ceramics International, 43 (1). pp. 590-598. ISSN 0272-8842

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/j.ceramint.2016.09.199

Abstract

Co-Zr doped SrCoxZrxFe(12-2x)O19 (x=0.0, 0.2, 0.4, 0.6, 0.8 and 1.0) have been synthesized by citrate precursor sol-gel method. We have studied the impact of coupled substitution of magnetic Co2+ and non-magnetic Zr4+ for Fe3+ on the morphology, magnetic, microwave and electromagnetic properties of SrCoxZrxFe(12-2x)O19. Characterization of these materials has been done by XRD, FT-IR, EDS, TEM, VSM and Mössbauer spectroscopy techniques. Complex permeability (μ′), complex permittivity (ε′) and reflection loss curves have also been analyzed. XRD analysis indicates the formation of single phase hexagonal ferrites at a low temperature of 800°C. Mossbauer spectra indicates that the dopant ions are located on the tetrahedral 4f1 and octahedral 4f2 sites up to x=0.4, octahedral 12k site and bipyramidal 2b site for x=0.6 and 12k site for x=0.8–1.0. The reflection loss (R.L.) analysis shows that all the ferrites (except x=0.2) have wide absorption bandwidth (R.L.<−10 dB for 2–3.5 GHz) with peaks of 90–99% absorption in 12.4–18 GHz band.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Magnetic Materials; Sol-gel Chemistry; Mossbauer Spectroscopy; Dielectric Properties; X-ray Diffraction
ID Code:110408
Deposited On:01 Dec 2017 11:59
Last Modified:01 Dec 2017 11:59

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