Abstract
La–Zn substituted M-type Ba hexaferrite powders were prepared by sol-gel (Mx) and organometallic precursor (Sk) methods with Fe/Ba ratio of 11.6 and 10.8, respectively. The compositions (LaZn) x Ba1 − x Fe12 − x O19 with 0.0 ≤ x ≤ 0.6 were annealed at 975°C/2 h. The cationic site preferences of nonmagnetic La3+ instead of Ba2+ ions and Zn2+ instead of Fe3+ ions were determined by Mössbauer spectroscopy. The La3+ ions substitute the large Ba2+ ions at 2a site and for x ≥ 0.4 also at 4f2 site. The nearly all Zn2+ ions are placed at the 4f1 sites. The thermomagnetic analysis of χ(ϑ) confirms that only the small substitutions for x ≤ 0.4 can be taken as a single-phase hexaferrites. The coercivity H c almost does not change at x = 0.2 for (Mx) samples and further decrease up to x = 0.6. For (Sk) samples at substitution x = 0.2 the values of H c are decreasing and at higher x the values nearly do not change. The Curie points, T c, slowly decrease with x for both (Mx) and (Sk) samples.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
Rane, M.V., et al.: J. Magn. Magn. Mater. 195, L256 (1999)
Rane, M.V., et al.: J. Magn. Magn. Mater. 192, 288 (1999)
Corral, J.C., et al.: J. Magn. Magn. Mater. 242–245, 430 (2002)
Zhong, W., et al.: J. Magn. Magn. Mater. 168, 196 (1997)
Grusková, A., et al.: J. Magn. Magn. Mater. 242–245, 423 (2002)
Mendoza-Suárez, G., et al.: Mater. Chem. Phys. 9454, 1 (2002)
Lipka, J., et al.: J. Magn. Magn. Mater. 140–144, 2209 (1995)
Liu, X., et al.: J. Magn. Magn. Mater. 238, 207 (2002)
Liu, X., et al.: J. Appl. Phys. 87(5), 2503 (2000)
Dosoudil, R.: J. Electr. Eng. 53(10/S), 135 (2002)
Jančárik, V., et al.: J. Electr. Eng. 50(8/S), 63 (1999)
Zhou, J.X., et al.: IEEE Trans. Magn. 27(6), 4654 (1991)
Sauer, Ch., et al.: J. Phys. Chem. Solids 39, 1197 (1978)
Turilli, G., et al.: IEEE Trans. Magn. 24, 2865 (1988)
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Grusková, A., Lipka, J., Papánová, M. et al. La–Zn Substituted Hexaferrites Prepared by Chemical Method. Hyperfine Interact 164, 27–33 (2005). https://doi.org/10.1007/s10751-006-9230-8
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10751-006-9230-8