Very high-density and low-cost perpendicular magnetic recording media including new layer-structure 'U-Mag'
| Autor: | Satoshi Matsunuma, Akira Yano, Yasutaka Nishida, Norio Ota, Hideaki Yamanaka, Katsusuke Shimazaki, Tetsunori Koda, I. Tagawa, Enji Fujita |
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| Rok vydání: | 2005 |
| Předmět: |
Materials science
Condensed matter physics business.industry Nucleation Coercivity Microstructure Electronic Optical and Magnetic Materials Condensed Matter::Materials Science Lattice constant Optics Ferromagnetism Transmission electron microscopy Perpendicular Electrical and Electronic Engineering business Layer (electronics) |
| Zdroj: | IEEE Transactions on Magnetics. 41:572-576 |
| ISSN: | 0018-9464 |
| DOI: | 10.1109/tmag.2004.838070 |
| Popis: | We have fabricated a new layered structure, named "U-mag," for perpendicular magnetic recording media, in terms of stacked films including a very thin (2 nm) ferromagnetic (Co) intermediate layer and lattice spacing control layers. The formed medium having a 100-nm soft magnetic underlayer with high coercivity over 6 kOe and sufficient nucleation field (-1.5 kOe) shows higher signal-to-noise ratio (SNR) than a medium with a conventional Ru underlayer. The detailed microstructures of the U-mag medium were also revealed by a transmission electron microscope with an energy dispersive spectrometer. A double Co intermediate layer gave a significant improvement in the SNR compared to a single Co layer. |
| Databáze: | OpenAIRE |
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