Coercivity enhancement in Pr-Fe-B magnets with small additions of Cu and Zn

Addition of small amounts of Cu and Zn was found to enhance the coercivity Hc of Pr-Fe-B melt-spun magnets. 1.5% Cu addition increases the coercivity by 6 kOe over the Cu free value of 18 kOe while 3% Zn increases Hc by 8 kOe. Both of the additions cause a reduction in grain size, and lead to distur...

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Veröffentlicht in:	Journal of applied physics 1991-11, Vol.70 (10), p.6450-6452
Hauptverfasser:	WITHANAWASAM, L, ZHANG, Y. J, HADJIPANAYIS, G. C
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Condensed matter: electronic structure, electrical, magnetic, and optical properties Domain effects, magnetization curves, and hysteresis Exact sciences and technology Magnetic properties and materials Metals. Metallurgy Physics
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Zusammenfassung:	Addition of small amounts of Cu and Zn was found to enhance the coercivity Hc of Pr-Fe-B melt-spun magnets. 1.5% Cu addition increases the coercivity by 6 kOe over the Cu free value of 18 kOe while 3% Zn increases Hc by 8 kOe. Both of the additions cause a reduction in grain size, and lead to disturbed lattice planes at grain boundaries and to thin PrCu(Zn) layers which are partially surrounding the 2:14:1 grains. The enhancement in coercivity is believed to be the result of these microstructural changes at the grain boundaries.
ISSN:	0021-8979 1089-7550
DOI:	10.1063/1.349927