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Hard-soft GMR sensors with Co-Rh based artificial antiferromagnetic subsystem

The superiority of Rh as antiferromagnetic (AF) coupler in the magnetic rigid Co/Rh/Co subsystem (AAF) of GMR sensors compared to Cu is experimentally demonstrated. It originates in the more than ten times higher coupling strength (J/sub max/=-5 mJ/m/sup 2/) of sputtered Co/Rh/Co sandwiches. On Rh/C...

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Bibliographic Details
Published in:IEEE transactions on magnetics 1998-07, Vol.34 (4), p.1336-1338
Main Authors: van den Berg, H.A.M., Rupp, G., Clemens, W., Gieres, G., Vieth, M., Wecker, J., Zoll, S.
Format: Article
Language:English
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Summary:The superiority of Rh as antiferromagnetic (AF) coupler in the magnetic rigid Co/Rh/Co subsystem (AAF) of GMR sensors compared to Cu is experimentally demonstrated. It originates in the more than ten times higher coupling strength (J/sub max/=-5 mJ/m/sup 2/) of sputtered Co/Rh/Co sandwiches. On Rh/Cu buffers, the relative Rh-thickness window with complete AF coupling is three times larger than of Cu, thus relieving the deposition tolerances. The stability window of the rotating field in angle detectors increases by a factor of two for the Rh-AAF's. The angular resolution of 0.2/spl deg/ of Rh-sensors is a factor of four better than for their Cu pendants.
ISSN:0018-9464
1941-0069
DOI:10.1109/20.706540