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- Title
Structure Optimization of FePt Nanoparticles of Various Sizes for Magnetic Data Storage.
- Authors
Tanase, M.; Zhu, J.-G.; Liu, C.; Shukla, N.; Klemmer, T. J.; Weller, D.; Laughlin, D. E.
- Abstract
Surfactant-coated, fcc disordered FePt nanoparticles of three different sizes between 3 and 7 nm were prepared and washed according to a modified reaction route based on Sun et aI.[1] Hexane dispersions of nanoparticles were dried on transmission electron microscopy (TEM) grids, and the resulting monolayers were annealed by a sinter-free procedure at 600 °C and at 650 °C for 2 hours, respectively, developing the L10 phase while preserving their monodispersity. The order parameter of the L10 phase was measured using electron diffraction from statistically large ensembles of nanoparticles using an X-ray-like signal collection technique. The order parameter increases with particle size and with the temperature in the range 600 °C to 650 °C, being close to unity for the 7.2-nm particles annealed at 650 °C for 2 hours.
- Subjects
INFORMATION retrieval; NANOPARTICLES; SURFACE active agents; TRANSMISSION electron microscopy; HEXANE; MONOMOLECULAR films; ANNEALING of metals; ELECTRON diffraction; PHYSIOLOGICAL effects of temperature
- Publication
Metallurgical & Materials Transactions. Part A, 2007, Vol 38, Issue 4, p798
- ISSN
1073-5623
- Publication type
Article
- DOI
10.1007/s11661-006-9081-6