1. Suppression of in-plane (001) texture component in FePt-oxide granular films by adding a carbon buffer layer.
- Author
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Tham, Kim Kong, Kushibiki, Ryosuke, and Saito, Shin
- Subjects
CARBON films ,BUFFER layers ,PERPENDICULAR magnetic anisotropy ,X-ray diffraction ,MAGNETIC properties - Abstract
Investigation of magnetic properties and nanostructure of FePt-B
2 O3 granular film with carbon buffer layer (BL) of various thicknesses is reported. When the thickness of carbon BL is varied from 0 to 0.6 nm, saturation magnetization (Ms film ) is almost constant at around 750 emu/cm3 and perpendicular magnetic anisotropy (Ku⊥ film ) changes from around 1.0×107 to 2.0×107 erg/cm3 . For the granular film with the carbon BL thicker than 0.6 nm, both Ms film and Ku⊥ film decrease. The reduction of Ms film for the granular film by adding a carbon BL may be due to the alloying of carbon into the FePt magnetic grains. The enhancement of Ku⊥ film for the film with a 0.6 nm carbon BL is considered due to the reduction of the in-plane texture component which is supported by the in-plane XRD. The reduction of Ku⊥ film for the film with a carbon BL thicker than 0.6 nm is considered due to random growth of magnetic grains on a continuous carbon BL which is supported by the TEM cross-section images. According to these results, the employment of an un-continuous thin carbon BL is a promising method to enhance c-axis texture orientation of the FePt-oxide granular films. [ABSTRACT FROM AUTHOR]- Published
- 2024
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