Title :
Giant magnetoresistance effect in CoNiFe/Cu spin valves
Author :
Kitade, Y. ; Kikuchi, H. ; Kishi, H. ; Otagiri, M. ; Kobayashi, K.
Author_Institution :
Fujitsu Labs. Ltd., Atsugi, Japan
fDate :
11/1/1995 12:00:00 AM
Abstract :
We studied the MR effect of a spin valve when using CoNiFe as the magnetic layer, yielding zero magnetostriction. An MR ratio of 6.8% with a saturation field of 3.6 Oe was obtained when using a Co45Ni 30Fe25 composition. Also we investigated the heat stability of this spin valve. A patterned, unshielded CoNiFe spin valve sensor was fabricated, and it transfer curve showing greater sensitivity than NiFe/Cu spin valves and exhibited no hysteresis
Keywords :
cobalt alloys; coercive force; copper; ferromagnetic materials; giant magnetoresistance; iron alloys; magnetic multilayers; magnetoresistance; magnetoresistive devices; nickel alloys; soft magnetic materials; thermal stability; CoNiFe-Cu; coercive force; giant magnetoresistance effect; heat stability; saturation field; sensitivity; spin valve sensor; spin valves; transfer curve; zero magnetostriction; Argon; Coercive force; Giant magnetoresistance; Iron; Magnetostriction; Saturation magnetization; Soft magnetic materials; Spin valves; Sputtering; Stability;
Journal_Title :
Magnetics, IEEE Transactions on
