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57Fe Mössbauer study of CoCrxFe2-xO4 nano ferrite.
- Source :
- Hyperfine Interactions; 12/6/2021, Vol. 242 Issue 1, p1-15, 15p
- Publication Year :
- 2021
-
Abstract
- We report sol gel auto-combustion synthesized CoCr<subscript>x</subscript>Fe<subscript>2-x</subscript>O<subscript>4</subscript> (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 Cr<superscript>3+</superscript> ions remain more populated on B-site, whereas Co<superscript>2+</superscript> 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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03043843
- Volume :
- 242
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Hyperfine Interactions
- Publication Type :
- Academic Journal
- Accession number :
- 153978905
- Full Text :
- https://doi.org/10.1007/s10751-021-01781-z