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Content Provider | IEEE Xplore Digital Library |
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Author | Mao, M. Funada, S. Hung, C.-Y. Schneider, T. Miller, M. Tong, H.-C. Qian, C. Miloslavsky, L. |
Copyright Year | 1965 |
Abstract | IrMn exchange biased bottom spin-valve films of structure Ta/underlayer/IrMn/CoFe/Cu/CoFe/NiFe/Ta were prepared using ion beam deposition techniques. The exchange bias field exhibits strong underlayer thickness dependence. For the first time, a large exchange energy of 0.29 erg/cm/sup 2/ was measured in spin-valve films exchange biased by a disordered antiferromagnet, comparable to the values usually obtained in spin valve films exchange biased by an ordered antiferromagnet. We have conducted a comparative study on both bottom and top exchange biased spin-valve and ferromagnetic/antiferromagnetic bilayer films. The results indicate that the exchange field obeys very well the inverse pinned layer thickness law over a thickness range from 200 /spl Aring/ down to 10 /spl Aring/. The exchange energy for bottom spin-valve films is, however, a factor of two larger than that for top spin-valve films. When normalized, the exchange field exhibits the same temperature dependence for both bottom and top spin valve films. The enhancement in exchange biasing is mainly attributed to an enhanced texture for fcc [111] crystallographic orientation of the IrMn layer in bottom spin-valve films. |
Sponsorship | IEEE Magnetics Society |
Starting Page | 3913 |
Ending Page | 3915 |
Page Count | 3 |
File Size | 247774 |
File Format | |
ISSN | 00189464 |
Volume Number | 35 |
Issue Number | 5 |
Language | English |
Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Publisher Date | 1999-09-01 |
Publisher Place | U.S.A. |
Access Restriction | One Nation One Subscription (ONOS) |
Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subject Keyword | Magnetic films Magnetic field measurement Ion beams Antiferromagnetic materials Magnetic sensors Magnetization Coercive force Valves Giant magnetoresistance Energy measurement |
Content Type | Text |
Resource Type | Article |
Subject | Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering |
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