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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Viala, B. Visentin, G. Gaud, P. |
| Copyright Year | 1965 |
| Abstract | Antiferromagnetic/ferromagnetic/antiferromagnetic (AF/F/AF) multilayers are investigated. The AF layer is 500-/spl Aring/-thick Ni/sub 50/Mn/sub 50/. Films are studied as a function of the thickness of the ferromagnetic layer (e/sub F/). Films with Ni/sub 80/Fe/sub 20/, Co/sub 50/Fe/sub 50/, and Co/sub 90/Fe/sub 10/ exhibit interfacial exchange coupling energy densities (J/sub ex/) of 0.22, 0.82, and 0.97 erg.cm/sup -2/ respectively. High J/sub ex/ ensures strong exchange coupling (H/sub ex/) and large uniaxial anisotropy fields (H/sub ua/) at 90/spl deg/ from the pinning direction. This promotes soft magnetism in CoFe films while they are not soft naturally. With e/sub F/=150 /spl Aring/,H/sub ua/ is of 570 and 755 Oe for Co/sub 50/Fe/sub 50/ and Co/sub 90/Fe/sub 10/, respectively. Thicknesses of /spl sim/0.3 /spl mu/m are also shown possible for practical use by means of multiple alternations (n /spl ges/ 20). Microwave characterizations confirm coherent reversible magnetization processes. Co/sub 50/Fe/sub 50/ multilayers are the best candidates with the highest /spl mu/' and the lowest /spl mu/'' at high frequency because an exceptional combination of a high 4/spl pi/M/sub s/ of 21 kG and a small damping factor of 0.015. ferromagnetic resonance frequencies of /spl sim/5 GHz are reported, and values of /spl sim/10 GHz are shown realistic, for the first time. |
| Sponsorship | IEEE Magnetics Society |
| Starting Page | 1996 |
| Ending Page | 1998 |
| Page Count | 3 |
| File Size | 156689 |
| File Format | |
| ISSN | 00189464 |
| Volume Number | 40 |
| Issue Number | 4 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2004-07-01 |
| Publisher Place | U.S.A. |
| Access Restriction | One Nation One Subscription (ONOS) |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Nonhomogeneous media Magnetic resonance Frequency Iron Antiferromagnetic materials Anisotropic magnetoresistance Magnetic anisotropy Perpendicular magnetic anisotropy Soft magnetic materials Magnetization processes |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering |
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