Magnetic properties of a new family of rare-earth substituted ferrites
The magnetic properties of substituted hard-magnetic M-type ferrites are surveyed. A combined La–Co substitution leads to magnets of compositions Ba 1− x La x Fe 12− x Co x O 19 and Sr 1− x La x Fe 12− x Co x O 19 ( x= 0, 0.1, 0.2, 0.3, 0.4). Due to this substitution, the anisotropy as well as the c...
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| Veröffentlicht in: | Physica. B, Condensed matter Condensed matter, 2003-04, Vol.327 (2), p.202-207 |
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| Hauptverfasser: | , , , , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | The magnetic properties of substituted hard-magnetic M-type ferrites are surveyed. A combined La–Co substitution leads to magnets of compositions Ba
1−
x
La
x
Fe
12−
x
Co
x
O
19 and Sr
1−
x
La
x
Fe
12−
x
Co
x
O
19 (
x= 0, 0.1, 0.2, 0.3, 0.4). Due to this substitution, the anisotropy as well as the coercivity increases. The effect of the ion size was studied on the system (Sr
1−
y
Ca
y
)
1−
x
La
x
Fe
12−
x
Co
0.75
x
Fe
2+
0.25
x
O
19 (
x= 0.2, 0.4;
y= 0, 0.33, 0.66, 1). Additionally, Sm substitution which leads to a strong increase of the coercivity was studied, but the effect on the anisotropy is small (1%). |
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| ISSN: | 0921-4526 1873-2135 |
| DOI: | 10.1016/S0921-4526(02)01728-3 |