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초록
Magnetic recording media requires good particle dispersion, a smooth surface, and small interparticle interaction to make an adequate signal-to-noise ratio (SNR). Well dispersed 50-60 nm sized spherical barium-strontium ferrite (S-Ba/Sr-Fe) nanoparticles were successfully prepared with 40 nm sized hematite precursor particles and BaCO3/SrCO3 colloid. The coercivity and saturation magnetizations of S-Ba/Sr-Fe nano-particles were 1568 Oe and 48.6 emu/g, respectively. In order to evaluate magnetic interaction, magnetic tape was prepared using an Eiger mill with binder and organic solvent. A AY measurement showed the S-Ba/Sr-Fe nanoparticles in the tape had negative magnetic particle-to-particle interaction.
키워드
barium ferrite; magnetic interaction; nanoparticles; particulate recording media; PARTICULATE; MEDIA
- 제목
- Synthesis of nano-sized spherical barium-strontium ferrite particles
- 저자
- Gee, SH; Hong, YK; Jeffers, FJ; Park, MH; Sur, JC; Weatherspoon, C; Nam, IT
- 발행일
- 2005-11
- 유형
- Article; Proceedings Paper
- 권
- 41
- 호
- 11
- 페이지
- 4353 ~ 4355