57Fe Mössbauer study of CoCrxFe2-xO4 nano ferrite View Full Text


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Article Info

DATE

2021-12-06

AUTHORS

P. Tiwari, R. Verma, S. S. Modak, V. R. Reddy, F. Mazaleyrat, S. N. Kane

ABSTRACT

We report sol gel auto-combustion synthesized CoCrxFe2-xO4 (x = 0.0 − 1.0) spinel ferrites, and use x-ray diffraction ‘XRD’, magnetic measurements, and Mössbauer spectroscopy to study the effect of Cr-content on their structural properties, magnetic properties, and correlation between them. Formation of single-phase nono spinel ferrite (grain size: 18.1 – 46.6 nm), is confirmed by XRD. Results show that with increasing Cr-content, lattice parameter decreases, and Cr3+ ions remain more populated on B-site, whereas Co2+ ions remains almost equally populated on both A, B site, show lower disorder, and modification of A–O − A, B– O − B, A–O − B super-exchange interaction. For Cr-content ≥ 0.75, Mössbauer measurements show presence of a non-magnetic doublet, and isomer shift values confirm that Fe has 3 + oxidation state. Observed structural changes, lead to reduction of saturation magnetization, coercivity. More... »

PAGES

51

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URI

http://scigraph.springernature.com/pub.10.1007/s10751-021-01781-z

DOI

http://dx.doi.org/10.1007/s10751-021-01781-z

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https://app.dimensions.ai/details/publication/pub.1143664547


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