Abstract
ZnFe2O4 nanoparticles were prepared by using a high-temperature thermal-decomposition method and was investigated by using X-ray diffraction (XRD), high-resolution transmission electron spectroscopy (HR-TEM), MagneTherm, vibrating sample magnetometry (VSM) and Mössbauer spectroscopy. The XRD patterns revealed cubic spinel structures with space group Fd-3m. ZnFe2O4 nanoparticles were exposed to an argon plasma for 30 min. The self-heating temperature increased up to 37 °C during plasma treatment for 30 min. Magnetic measurements showed that the blocking temperature increased from 72 to 78 K during the plasma treatment. A high saturation magnetization was obtained in the partially-inverted spinel. In order to confirm the cation distribution and the phase transition, we performed Mössbauer measurement. The Mössbauer spectra of ZnFe2O4 before and after plasma treatment showed Fe3+ valence states at room temperature. Also, the Néel temperature of ZnFe2O4 was found to be larger after the plasma treatment.
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Choi, H., Kim, S.J., Kim, C.S. et al. Characterization of partially-inverted zinc ferrite with a bio-plasma treatment. Journal of the Korean Physical Society 69, 847–851 (2016). https://doi.org/10.3938/jkps.69.847
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DOI: https://doi.org/10.3938/jkps.69.847