Information and communication systems increasingly handle huge amounts of data, placing heavy demands on hard disk storage capacity and performance. Progress in the development of giant magnetoresistive (GMR) spin-valve materials and high-sensitivity spin-valve read heads has allowed a continuous increase of areal recording density in hard disk drives. This paper describes our advanced spin-valve head technology. This technology features a bottom type synthetic ferrimagnetic spin-valve with low magnetostriction. It comprises a magnetic layer, Ru interlayer, and magnetic layer sandwich as a pinned layer. It also has a specular spin-valve with specular reflection layers consisting of a layer of natural oxide or another oxide material. The synthetic ferrimagnet spin-valve and the specular spin-valve enable increased read-back output of the spin-valve head. This paper also describes our demonstration of over 100 Gbit/in2 technologies at areal recording densities achieved by a high-sensitivity, double-specular spin-valve head on synthetic ferrimagnet media.
|Number of pages||9|
|Journal||Fujitsu Scientific and Technical Journal|
|Publication status||Published - 2001 Dec|
All Science Journal Classification (ASJC) codes
- Human-Computer Interaction
- Hardware and Architecture
- Electrical and Electronic Engineering