Abstract
The processing, structure, and magnetism of highly coercive Sm-Co and FePt thin-film nanostructures are investigated. The structures include 1:5 based Sm-Co-Cu-Ti magnets, particulate FePt:C thin films, and FePt nanotubes. As in other systems, the coercivity depends on texture and imperfections, but there are some additional features. A specific coercivity mechanism in particulate media is a discrete pinning mode intermediate between Stoner-Wohlfarth rotation and ordinary domain-wall pinning. This mechanism yields a coercivity maximum for intermediate intergranular exchange and explains the occurrence of coercivities of 5 T in particulate Sm-Co-Cu-Ti magnets.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 227-230 |
| Number of pages | 4 |
| Journal | Journal of Magnetism and Magnetic Materials |
| Volume | 290-291 PART 1 |
| DOIs | |
| State | Published - Apr 2005 |
Keywords
- Coercivity
- Domain-wall pinning
- Hard magnetic materials
- Magnetic nanostructures
- Magnetization reversal
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
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Zhou, J., Skomski, R., Kashyap, A., Sorge, K. D., Sui, Y., Daniil, M., Gao, L., Yan, M. L., Liou, S. H., Kirby, R. D., & Sellmyer, D. J. (2005). Highly coercive thin-film nanostructures. Journal of Magnetism and Magnetic Materials, 290-291 PART 1, 227-230. https://doi.org/10.1016/j.jmmm.2004.11.189