NDLI: La–Zn Substituted Hexaferrites Prepared by Chemical Method

Content Provider	Springer Nature Link
Author	Grusková, A. Lipka, J. Papává, M. Sláma, J. Tóth, I. Kevická, D. Mendoza, G. Corral, J. C. Šubrt, J.
Copyright Year	2006
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.
Starting Page	27
Ending Page	33
Page Count	7
File Format	PDF
ISSN	03043843
Journal	Hyperfine Interactions
Volume Number	164
Issue Number	1-4
e-ISSN	15729540
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2006-07-14
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	ferrites-hexagonal magnetic recording Mössbauer effect Surfaces and Interfaces, Thin Films Condensed Matter Atoms, Molecules, Clusters and Plasmas Nuclear Physics, Heavy Ions, Hadrons
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Atomic and Molecular Physics, and Optics Physical and Theoretical Chemistry Condensed Matter Physics

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