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Nano-oxide-layer specular spin valve heads with synthetic pinned layer: Head performance and reliability.
- Source :
-
Journal of Applied Physics . 5/15/2002 Part 1, 2 & 3, Vol. 91 Issue 10, p8774. 3p. 1 Diagram, 1 Chart, 4 Graphs. - Publication Year :
- 2002
-
Abstract
- To implement the specular nano-oxide-layer (NOL) spin valve (SV) heads for use in practical applications, it is key to simultaneously achieve a good specular effect of the NOL inserted in the synthetic ferrimagnet pinned layer (i.e., high magnetoresistance MR performance) and a strong pinning field through the NOL. By using CoFe+X as a substance to be subjected to oxidation, we obtained the NOL specular SV films simultaneously achieving a high MR ratio of 17%-18% and a high pinning field of 1100-1500 Oe. Narrow track (0.12 µm) heads were fabricated and they showed a high sensitivity of 10 mV/µm. Several reliability tests were done both at the sheet film level and the actual head level. The oxygen inside NOL was found to be stable up to 350 °C, and pinned layer magnetization canting after orthogonal field annealing was found to be almost the same as today's non-NOL SV films. An electrostatic discharge test and accelerated lifetime test were also performed and NOL specular heads were demonstrated to have almost the same robustness as today's non-NOL heads. [ABSTRACT FROM AUTHOR]
- Subjects :
- *VALVES
*FERRIMAGNETISM
Subjects
Details
- Language :
- English
- ISSN :
- 00218979
- Volume :
- 91
- Issue :
- 10
- Database :
- Academic Search Index
- Journal :
- Journal of Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 6666535
- Full Text :
- https://doi.org/10.1063/1.1456054