Mössbauer Study of Nickel-Substituted Cobalt Ferrites

Authors V.S. Bushkova1 , I.P. Yaremiy1 , B.K. Ostafiychuk1 , 2 , V.V. Moklyak2, A.B. Hrubiak2

1Vasyl Stefanyk Precarpathian National University, 57, Shevchenko St., 76025 Ivano-Frankivsk, Ukraine

2G.V. Kurdyumov Institute of Metal Physics, National Academy of Science, 36, Aсad. Vernadsky Boulevard, 03680 Kyiv, Ukraine

Е-mail bushkovavira@gmail.com
Issue Volume 10, Year 2018, Number 3
Dates Received 31 January 2018; revised manuscript received 04 June 2018; published online 25 June 2018
Citation V.S. Bushkova, I.P. Yaremiy, B.K. Ostafiychuk, et al., J. Nano- Electron. Phys. 10 No 3, 03013 (2018)
DOI https://doi.org/10.21272/jnep.10(3).03013
PACS Number(s) 75.75. + a, 76.80. + y
Keywords Ferrite (18) , Nanoparticles (70) , Mössbauer spectra, Energy dispersive X-ray spectroscopy.

Nanosize nickel-substituted cobalt ferrites were prepared using the technology sol-gel with participation of auto-combustion (SGA) and characterized by EDX and Mössbauer spectroscopy. Mössbauer spectrum of CoFe2O4 powder at room temperature exhibited broad sextet and doublet, suggesting superparamagnetic nature of the sample. The subtituted samples showed only broad sextet, which is resolved into two sub-sextets, corresponding to tetrahedrally and octahedrally coordinated Fe cations. Cation distribution calculated using XRD and Mössbauer data indicates a decrease in Fe3 +[B]/Fe3 +(A) ratio with increasing nickel concentration.

List of References