The magnetic properties of substituted hard-magnetic M-type ferrites are surveyed. A combined La-Co substitution leads to magnets of compositions Ba 1-xLa xFe 12-xCo xO 19 and Sr 1-xLa xFe 12-xCo xO 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-yCa y) 1-xLa xFe 12-x Co 0.75xFe 2+ 0.25xO 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%).
Magnetic properties of a new family of rare-earth substituted ferrites / Grössinger, R; Tellez Blanco, C; Kuepferling, Michaela; Müller, M; Wiesinger, G.. - In: PHYSICA. B, CONDENSED MATTER. - ISSN 0921-4526. - 327:2-4(2003), p. 60799.202. [10.1016/S0921-4526(02)01728-3]
Magnetic properties of a new family of rare-earth substituted ferrites
KUEPFERLING, MICHAELA;
2003
Abstract
The magnetic properties of substituted hard-magnetic M-type ferrites are surveyed. A combined La-Co substitution leads to magnets of compositions Ba 1-xLa xFe 12-xCo xO 19 and Sr 1-xLa xFe 12-xCo xO 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-yCa y) 1-xLa xFe 12-x Co 0.75xFe 2+ 0.25xO 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%).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
