DocumentCode :
973636
Title :
Magnetocrystalline anisotropy of (NdxSm(1-x))2(Co0.7Fe0.3)17
Author :
Lee, R.W.
Author_Institution :
General Motors Research Laboratories, Warren, Michigan
Volume :
15
Issue :
6
fYear :
1979
fDate :
11/1/1979 12:00:00 AM
Firstpage :
1762
Lastpage :
1764
Abstract :
The magnetic property which limits permanent magnet application of rare earth-transition metal compounds of the R2TM17type is the relatively low coercivity compared with that of the RCo5compounds. Of the plentiful, light rare earths, neodymium most strongly promotes undesirable planar magnetic anisotropy in both type magnets; but in RCo5, Nd substituted to ∼ 20% of the rare earth content has been reported to strongly enhance coercivity[6]. In anticipation of a similar effect in R2TM17compounds, the intrinsic property, magnetocrystalline anisotropy upon which coercivity depends, was measured as a function of Nd in the series (NdxSm1-x)2(Co0.7Fe0.3)17for x=0, 0.25, 0.5, 0.75, and 1.0 over the temperature range 100K < T < 350K. More than 50% of the Sm can be replaced by Nd before the uniaxial anisotropy reverts to planar. Therefore, the greater natural abundance of Nd and the liklihood of coercivity enhancement makes this rare earth a good candidate for substitution in 2:17 type permanent magnets.
Keywords :
Coercive forces; Magnetic anisotropy; Permanent magnet materials; Anisotropic magnetoresistance; Coercive force; Iron; Magnetic anisotropy; Magnetic properties; Neodymium; Permanent magnets; Perpendicular magnetic anisotropy; Temperature dependence; Temperature distribution;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.1979.1060493
Filename :
1060493
Link To Document :
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