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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Keller, N. Guyot, M. Das, A. Porte, M. Krishnan, R. |
| Copyright Year | 1965 |
| Abstract | We prepared multilayer films based on NiO and /spl alpha/Fe/sub 2/O/sub 3/ by pulsed laser ablation. In these NiO//spl alpha/Fe/sub 2/O/sub 3/ and /spl alpha/Fe/sub 2/O/sub 3//NiO multilayers, interdiffusion leads to the formation of the nickel ferrite NiFe/sub 2/O/sub 4/ at the interfaces. Its ferrimagnetism provides a local probe on the admixture of the antiferromagnetic oxides NiO and /spl alpha/Fa/sub 2/O/sub 3/ which is macroscopically measurable. We performed magnetization, torque and magneto-optical measurements on the multilayer samples. Surprisingly, an oscillation of the total magnetic moment m as a function of the number of interfaces was observed. The oscillation of m reverses when the succession of NiO//spl alpha/Fe/sub 2/O/sub 3/ layers is inverted to /spl alpha/Fe/sub 2/O/sub 3//NiO multilayers. This indicates a magnetic and structural nonequivalence of the NiO//spl alpha/Fe/sub 2/O/sub 3/ and the /spl alpha/Fe/sub 2/O/sub 3//NiO interfaces. This oscillation is observed in the magnetization, the Faraday effect and the coercive fields. Furthermore, Secondary Ion Mass Spectroscopy measurements (SIMS) on some NiO//spl alpha/Fe/sub 2/O/sub 3/ samples showed a well formed multilayer structure with pronounced interlayers. The presence of NiFe/sub 2/O/sub 4/ can be seen from transmission spectroscopy measurements which we performed on the /spl alpha/Fe/sub 2/O/sub 3//NiO multilayers series. |
| Sponsorship | IEEE Magnetics Society |
| Starting Page | 837 |
| Ending Page | 839 |
| Page Count | 3 |
| File Size | 419262 |
| File Format | |
| ISSN | 00189464 |
| Volume Number | 34 |
| Issue Number | 4 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1998-07-01 |
| 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 multilayers Performance evaluation Magnetization Optical pulses Laser ablation Nickel Ferrites Probes Antiferromagnetic materials |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering |
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