Synthesis of Sm-Ti-Fe and Nd-Fe-B magnetic films with special anisotropies
Rare earth transition metal film magnets of Nd-Fe-B and several new phases of the Sm-Ti-Fe system were synthesized by special sputtering methods to utilize the high magnetic anisotropies of these alloys. The magnetic properties of these film magnets were observed to be strongly dependent on the film textures. Thus, by varying the sputtering conditions, films with crystal textures were synthesized that gave rise to special anisotropies. Crystalline films of Sm(FeTi)/sub 2/ and SmCo/sub 3/ were synthesized with large perpendicular anisotropy of 10/sup 6/ erg/cm/sup 3/ whereas (SmTi)Fe/sub 5/ and Sm/sub 2/(FeCoZr)/sub 17/ were synthesized with inplane anisotropy and static energy product of 20 MG-Oe. The Nd/sub 2/Fe/sub 14/B film system is unique due to the fact that it can be synthesized with large perpendicular anisotropy of 1.5 x 10/sup 7/ erg/cm/sup 3/ with 9 kG remanent and 16 kOe coercive force or inplane anisotropy with 16 MG-Oe static energy product by controlling the sputtering rate. In addition, SmCo/sub 5/, (SmTi)Fe/sub 5/, and Sm/sub 2/(FeCoZr)/sub 17/ film systems were synthesized in amorphous states in the presence of an inplane magnetic field of 2.5 kOe and exhibited large uniaxial inplane anisotropy of 10/sup 6/ erg/cm/sup 3/. In particular, upon annealing from the amorphous state in the same magnetic field, the SmCo/sub 5/ phase exhibited a coercive force larger than 22 kOe and its moment could not be rotated within the film plane with a 22 kOe external field, thus increasing the uniaxial inplane anisotropy constant to at least 10/sup 7/ erg/cm/sup 3/.
- Research Organization:
- City Univ. of New York, NY (USA)
- OSTI ID:
- 6634567
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
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