Mechanism of coercivity enhancement by Ag addition in FePt-C granular films for heat assisted magnetic recording media
2014
We investigated the Ag distribution in a FePtAg-C granular film that is under consideration for a heat assisted magnetic recording medium by aberration-corrected scanning transmission electron microscope-energy dispersive X-ray spectroscopy and X-ray absorption fine structure. Ag is rejected from the core of FePt grains during the deposition, forming Ag-enriched shell surrounding L10-ordered FePt grains. Since Ag has no solubility in both Fe and Pt, the rejection of Ag induces atomic diffusions thereby enhancing the kinetics of the L10-order in the FePt grains.
Keywords:
- Spectroscopy
- Solubility
- Coercivity
- Heat-assisted magnetic recording
- Scanning transmission electron microscopy
- Extended X-ray absorption fine structure
- Transmission electron microscopy
- Analytical chemistry
- Inorganic chemistry
- Condensed matter physics
- Physics
- Granular material
- Deposition (law)
- Chemical engineering
- X-ray spectroscopy
- Correction
- Source
- Cite
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