Highly coercive thin-film nanostructures

J. Zhou, R. Skomski, A. Kashyap, K. D. Sorge, Y. Sui, M. Daniil, L. Gao, M. L. Yan, S. H. Liou, R. D. Kirby, D. J. Sellmyer

Research output: Contribution to journalArticle

9 Scopus citations

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 languageEnglish (US)
Pages (from-to)227-230
Number of pages4
JournalJournal of Magnetism and Magnetic Materials
Volume290-291 PART 1
DOIs
StatePublished - 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