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The effects of Co-metal clusters on exchange bias for Co-doped NiO/FeNi bilayers

Applied Surface Science, ISSN: 0169-4332, Vol: 252, Issue: 24, Page: 8611-8614
2006
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Article Description

Co-doped NiO inhomogeneous films were synthesized by sputtering metallic Co chips and NiO together and the exchange bias of bilayers Co-doped NiO/FeNi was investigated. When Co content was up to 25.2%, the exchange bias field H E at the room temperature increased to the maximum which was about three times compared to the undoped-bilayers. With further increase of Co content, the exchange bias field H E and blocking temperature T B decreased. Analysis suggests that the configuration of nanometer-sized Co-metal clusters enchased into NiO matrix played an important role in the change of magnetic behavior for the bilayers.

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