NDLI: Giant magnetoresistance in Co/Cu, Co/sub 9/Fe/Cu, and Co/sub 7.5/Fe/sub 2.5//Cu multilayers

Content Provider	IEEE Xplore Digital Library
Author	Saito, Y. Hashimoto, S. Inomata, K.
Copyright Year	1965
Abstract	The authors report that giant magnetoresistance (MR) at room temperature up to 52% for a low field change of 0.9 kOe can be attained in (Co/sub 9/Fe/Cu)/sub n/, multilayers. A set of (Co/sub x/Fe/sub 1-x//Cu)/sub n/ multilayers (x=1.0, 0.9 and 0.75) was prepared by an ion-beam sputter deposition method on MgO [110] single-crystal substrates. The MR ratio was found to be quite sensitive to the argon acceleration voltage (V/sub B/) in ion-beam sputtering and have a maximum around V/sub B/=600 V. In the preparation condition for obtaining maximum MR ratio, strong antiferromagnetic coupling (J) for the Co/sub x/Fe/sub 1-x/ layers via thin Cu layers and the oscillation behavior for this indirect exchange coupling with a 12-A period were observed. It was found that the MR ratio for Co/sub x/Fe/sub 1-x/ multilayers is larger than that for Co/Cu multilayers in the higher Co-concentration range in the Co/sub x/Fe/sub 1-x/ alloy. It was also found that in-plane uniaxial anisotropy (K/sub u/), on the order of 10 degrees erg/c/sup 3/, was induced when this system was prepared on MgO [110]. Giant MR can be induced for a small external field change for film with magnetocrystalline anisotropy. MR curve behavior can be explained by metamagnetic transition when K/sub u/, J, and Zeeman terms are considered.<>
Sponsorship	IEEE Magnetics Society
Starting Page	2751
Ending Page	2753
Page Count	3
File Size	323442
File Format	PDF
ISSN	00189464
Volume Number	28
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1992-09-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Giant magnetoresistance Iron Nonhomogeneous media Sputtering Anisotropic magnetoresistance Temperature Magnetic multilayers Substrates Argon Acceleration
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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