Magnetic coupling of the composite mixtures Sm{sub 2}Co{sub 17}/Sm{sub 2}Fe{sub 17}N{sub 3} and Sm{sub 2}Co{sub 17}/Fe
- Department of Physics, Trinity College, Dublin 2 (Ireland)
Mixing magnetically oriented 100 {mu}m particles of coercive Sm{sub 2}Co{sub 17} with 2{endash}10 {mu}m particles of Sm{sub 2}Fe{sub 17}N{sub 3} produces an enhanced hysteresis loop compared with the weighted averaged loops of the individual materials. The critical parameters involved are the sizes of the particles and the ratio of the two phases present. In 50:50 Sm{sub 2}Co{sub 17}/Sm{sub 2}Fe{sub 17}N{sub 3}, two phase mixtures, an increase in the coercivity from 0.9 to 1.0 T and a small increase in remanent magnetization is observed. Similar increases also appear in 50:50 mixtures of Sm{sub 2}Co{sub 17} and {alpha}{endash}Fe. The enhanced hysteresis loops are explained by the anisotropic nature of the dipolar interaction which causes the small particles to cluster near the magnetic axes of the larger one. {copyright} {ital 1997 American Institute of Physics.}
- OSTI ID:
- 496559
- Report Number(s):
- CONF-961141--
- Journal Information:
- Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 8 Vol. 81; ISSN JAPIAU; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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