Nanostructuring and texturing for improved magnetic materials

David J. Sellmyer, Y. Liu, T. A. George

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The concept of achieving a useful high-energy-product magnet through appropriate nanostructuring of known hard and soft phases has been tantalizing researchers since the idea was first proposed. The fabrication of exchange-coupled nanocomposite magnets faces several challenges including aligning the easy anisotropy axes of the hard-phase grains. Here we investigate experimentally two-phase nanostructures of hard L1 0-ordered FePt and soft iron-rich fcc Fe(Pt). The Fe-Pt thin films were produced by epitaxial co-sputtering onto MgO (001) single-crystal substrates which lead to strong (001) texturing. The measured hysteresis loops indicate nearly ideal exchange coupling. Excellent magnetic properties are obtained, with largest values of coercivity (51 kOe), saturation magnetization (1287 emu/ cm 3, J s = 16.2 kG), and nominal maximum energy product (58 MGOe).

Original languageEnglish (US)
Title of host publicationEnergy Technology 2012
Subtitle of host publicationCarbon Dioxide Management and Other Technologies - Held During the TMS 2012 Annual Meeting and Exhibition
Pages393-401
Number of pages9
StatePublished - 2012
EventEnergy Technology 2012: Carbon Dioxide Management and Other Technologies - TMS 2012 Annual Meeting and Exhibition - Orlando, FL, United States
Duration: Mar 11 2012Mar 15 2012

Publication series

NameTMS Annual Meeting

Conference

ConferenceEnergy Technology 2012: Carbon Dioxide Management and Other Technologies - TMS 2012 Annual Meeting and Exhibition
CountryUnited States
CityOrlando, FL
Period3/11/123/15/12

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

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  • Cite this

    Sellmyer, D. J., Liu, Y., & George, T. A. (2012). Nanostructuring and texturing for improved magnetic materials. In Energy Technology 2012: Carbon Dioxide Management and Other Technologies - Held During the TMS 2012 Annual Meeting and Exhibition (pp. 393-401). (TMS Annual Meeting).