Title :
Study of longitudinal stabilization using in-stack biasing
Author :
Ho, Michael K. ; Tsang, Ching ; Childress, Jeff ; Fontana, Robert ; Katine, Jordan ; Carey, Kashmira
Author_Institution :
San Jose Res. Center, Hitachi Global Storage Technol., San Jose, CA, USA
Abstract :
The in-stack stabilization of unshielded and shielded magnetic tunnel junction (MTJ) sensors have been studied experimentally by quasi-static and recording tests as well as theoretically by micromagnetic modeling. Results showed the viability of in-stack stabilization over a range of design and material conditions. Performance tradeoff studies and design optimization results led to the fabrication of MTJ read heads with good magnetic stability and high readback sensitivity.
Keywords :
magnetic recording; magnetic tunnelling; micromagnetics; spin valves; MTJ read heads; in-stack biasing; in-stack stabilization; longitudinal recording; longitudinal stabilization; magnetic head materials; magnetic stability; micromagnetic modeling; quasi-static test; read-write theory; readback sensitivity; recording test; shielded magnetic tunnel junction sensors; unshielded magnetic tunnel junction sensors; Design optimization; Fabrication; Magnetic heads; Magnetic materials; Magnetic recording; Magnetic sensors; Magnetic tunneling; Micromagnetics; Stability; Testing;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2003.821201
