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 Ll0-ordered FePt and soft iron-rich fee Fe(Pt). The Fe-Pt thin films were produced by epitaxial cosputtering 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), saturationmagnetization (1287 emu/ cm3, Js = 16.2 kG), and nominal maximum energy product (58 MGOe).
Original language | English (US) |
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Title of host publication | Energy Technology 2012 |
Subtitle of host publication | Carbon Dioxide Management and Other Technologies |
Publisher | John Wiley and Sons |
Pages | 393-401 |
Number of pages | 9 |
ISBN (Print) | 9781118291382 |
DOIs | |
State | Published - May 15 2012 |
Externally published | Yes |
Keywords
- Magnetic Materials
- Nanoindentation
- Transmission Electron Microscopy
ASJC Scopus subject areas
- General Materials Science