Abstract
Mn1−x Zn x Fe2O4 thin films with various Zn contents and of different thickness were synthesized on glass substrates directly by electroless plating in aqueous solution at 90°C without heat treatment. The Mn-Zn ferrite films have a single spinel phase structure and well-crystallized columnar grains growing perpendicularly to the substrates. The results of conversion electron 57Fe Mössbauer spectroscopy (CEMS) indicate that the cation distribution of Mn1−x Zn x Fe2O4 ferrite nanocrystal thin films fabricated by electroless plating is different from the bulk materials’ and a great quantity of Fe3+ ions are still present on A sites for x>0.5. When the Zn content of the films increases, Fe3+ ions in the films transfer from A sites to B sites and the hyperfine magnetic field reduces, suggesting that Zn2+ has strong chemical affinity towards the A sites. On the other side, with the increase of the thickness of the films, Fe3+ ions, at B sites in the spinel structure, increase and the array of magnetic moments no longer lies in the thin film plane completely. At x = 0.5, H c and M s of Mn1−x Zn x Fe2O4 thin films show a minimum of 3.7 kA/m and a maximum of 419.6 kA/m, respectively.
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Supported by the National Natural Science Foundation of China (Grant No. 90505007)
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Sun, J., Wang, X., Liu, J. et al. Structure and 57Fe conversion electron Mössbauer spectroscopy study of Mn-Zn ferrite nanocrystal thin films by electroless plating in aqueous solution. Chin. Sci. Bull. 53, 321–328 (2008). https://doi.org/10.1007/s11434-008-0045-7
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DOI: https://doi.org/10.1007/s11434-008-0045-7