Advanced MP++ and BaFe++ tapes
| Autor: | Dennis E. Speliotis |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
Materials science
Demagnetizing field Oxide Magnetic tape engineering.material equipment and supplies Condensed Matter Physics Electronic Optical and Magnetic Materials law.invention Metal Wavelength chemistry.chemical_compound Magnetization Nuclear magnetic resonance chemistry Coating law visual_art visual_art.visual_art_medium engineering Composite material human activities Barium ferrite |
| Zdroj: | Journal of Magnetism and Magnetic Materials. 155:83-85 |
| ISSN: | 0304-8853 |
| DOI: | 10.1016/0304-8853(95)00682-6 |
| Popis: | High-density magnetic tape recording has been expected to evolve from oxide particles to metal particles and ultimately to metal thin films which could provide the highest magnetization and the smallest thickness. Recent developments of very small metal particles (MP ++ ) with very high coercivities and magnetization, coupled with developments in double-coating technology which allow the coating of very thin and smooth particulate magnetic layers, are combined to produce advanced MP ++ tapes that outperform the metal evaporated (ME) tapes, while at the same time offering much greater reliability and lower cost. Micromagnetic simulations of high-density recording, however, show that high magnetization is undesirable at short wavelengths because of demagnetization and the spreading of the transition regions. Barium ferrite (BaFe) particulate coatings have low demagnetization, can support very narrow transitions, and are completely immune to environmental and chemical corrosion, making them the best choice for high-density recording particularly in combination with high-sensitivity MR transducers. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect