Title :
MR characteristics of synthetic ferrimagnet based spin-valves with different pinning layer thickness ratios
Author :
Moon, Ki-Seok ; Kim, Joo-Chan ; Ro, Jae-Chul ; Shong, E.Y. ; Lee, Seong Rae ; Kim, Young Keun
Author_Institution :
R&D Center, Samsung Electro-Mech. Co., Kyunggi, South Korea
fDate :
9/1/2000 12:00:00 AM
Abstract :
The dependence of magnetoresistance (MR) ratio and pinning characteristics on the two pinning layer thicknesses, in synthetic ferrimagnetic (SF) structure (P2/Ru/P1/AF), was investigated. The pinning field decreased monotonically when Δt (=tP2-t P1)=0 while it has its maximum at a specific tP2 when Δt(=tP2-tP1)≠0 as tP2 increased. MR ratio reached its maximum at a specific tP2 as tP2 increased. In the case of the fixed tP2, pinning field decreased whereas MR ratio increased as Δt increased. This trend is also found when the total thickness of P1 and P2 is fixed so that the current shunting to synthetic ferrimagnet (SF) trilayer is fixed. Both strong pinning field and sufficient MR ratio could be obtained by selecting appropriate Δt under the constraint of constant total thickness of SF trilayer
Keywords :
exchange interactions (electron); ferrimagnetic materials; giant magnetoresistance; magnetic domain walls; magnetic heads; magnetic multilayers; spin valves; MR characteristics; MR ratio; giant magnetoresistance; magnetic head; pinning characteristics; pinning layer thickness ratio dependence; strong interlayer exchange interaction; strong pinning field; synthetic ferrimagnet based spin-valves; Ferrimagnetic materials; Helium; Iron; Magnetic field measurement; Magnetic sensors; Magnetic separation; Magnetoresistance; Moon; Sputtering; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
