Geodesic
Single-domain particles of manganese-for-iron substituted M-type barium hexaferrite: synthesis, crystal structure, and magnetic properties
Nanosistemy: fizika, himiâ, matematika, Tome 15 (2024) no. 1, pp. 80-97

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Single-phase barium hexaferrite powders with crystallite sizes in a single-domain region and with the general composition BaFe$_{12-x}$Mn$_x$O$_{19}$, where $x$ = 0, 2, 4, 6, were synthesized applying a citric sol-gel auto-combustion technique with final annealing temperatures of 900 – 1200$^\circ$C. The crystal structures were refined, and the magnetic properties were studied. The observed variations in atomic positions with the Mn-for-Fe substitution revealed presence of Mn in three oxidation state +2, +3, and +4, with a preference of Mn$^{2+}$ to the tetrahedral 4f$_1$ site and Mn$^{4+}$ to the octahedral 2a and 12k sites. With the Mn-doping, the samples’ magnetization decreased, while coercivity increased and reached 8.4 kOe for $x$ = 6. The rise of the annealing temperature resulted in a slight growth of magnetization with a general tendency of the coercivity to decrease. A Curie temperature decreased with the Mn-doping remaining above room temperature for the maximal doping.
Keywords: magnetic materials, crystal structure, magnetization, coercivity.
Mots-clés : ferrites 
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     author = {Pavel E. Kazin and Anastasia E. Sleptsova and Alexander V. Vasiliev and Artem A. Eliseev and Robert E. Dinnebier and Sebastian Bette},
     title = {Single-domain particles of manganese-for-iron substituted {M-type} barium hexaferrite: synthesis, crystal structure, and magnetic properties},
     journal = {Nanosistemy: fizika, himi\^a, matematika},
     pages = {80--97},
     publisher = {mathdoc},
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     number = {1},
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     language = {en},
     url = {http://geodesic.mathdoc.fr/item/NANO_2024_15_1_a9/}
}
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%A Anastasia E. Sleptsova
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%A Robert E. Dinnebier
%A Sebastian Bette
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Pavel E. Kazin; Anastasia E. Sleptsova; Alexander V. Vasiliev; Artem A. Eliseev; Robert E. Dinnebier; Sebastian Bette. Single-domain particles of manganese-for-iron substituted M-type barium hexaferrite: synthesis, crystal structure, and magnetic properties. Nanosistemy: fizika, himiâ, matematika, Tome 15 (2024) no. 1, pp. 80-97. http://geodesic.mathdoc.fr/item/NANO_2024_15_1_a9/