Abstract
A Fe3O4/L1(0)-FePt bilayer thin-film magnet was fabricated via a simple one-step process by annealing Fe/Pt multilayer thin films in a N-2 gas flow. X-ray diffraction and plane-view selected-area electron diffraction results are identified with magnetite phase (Fe3O4) and L1(0)-FePt. Cross-sectional transmission electron microscopy images show the two phases form a bilayer structure. Magnetic hysteresis loops of the bilayer show single phase behavior which is interpreted as a result of the soft Fe3O4 phase exchange-coupled with the hard L1(0)-FePt phase, consistent with micromagnetic simulation prediction. Such bilayer structure may have potential for coercivity control in high density magnetic recording application. (C) 2008 Elsevier B.V. All rights reserved.
| Original language | English |
|---|---|
| Pages (from-to) | 2602-2605 |
| Number of pages | 4 |
| Journal | THIN SOLID FILMS |
| Volume | 517 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 27 Feb 2009 |
Keywords
- Magnetite
- Oxidation
- Exchange-coupled bilayer
- L1(0)-FePt
- X-ray diffraction
- Transmission electron microscopy
- Magnetic properties
- MAGNETIC-PROPERTIES
- X-RAY
- NANOPARTICLE ASSEMBLIES
- FEPT NANOPARTICLES
- RECORDING MEDIA
- ENERGY PRODUCT
- SPRING FILMS
- THIN-FILMS
- BEHAVIOR