High field magnetic measurements on sintered SmCo/sub 5/ permanent magnets
Conference
·
· AIP (Am. Inst. Phys.) Conf. Proc.; (United States)
OSTI ID:7359080
Hysteresis loops in fields to 100 kOe have been measured at 300, 77, and 4.2/sup 0/K parallel and perpendicular to the alignment axis in a series of sintered SmCo/sub 5/ magnets with compositions varying from 16.24 to 17.08 at. percent Sm. Analysis of the data taken perpendicular to the alignment axis permits evaluation of the effective anisotropy constant K/sub 1/, and also the degree of misorientation of the individual particles. Intrinsic coercive fields H/sub ci/ varied from 0.34 to 16.4 kOe at room temperature. In all samples, H/sub ci/ and K/sub 1/ increased rapidly with decreasing temperature, roughly doubling between room temperature and 77/sup 0/K. The values of H/sub ci/ and (BH)/sub max/ depend strongly on composition, but the anisotropy does not. Variations in permanent magnet properties are therefore not directly related to variations in the bulk anisotropy.
- Research Organization:
- Univ. of Pennsylvania, Philadelphia
- OSTI ID:
- 7359080
- Conference Information:
- Journal Name: AIP (Am. Inst. Phys.) Conf. Proc.; (United States) Journal Volume: 29
- Country of Publication:
- United States
- Language:
- English
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