화학공학소재연구정보센터
Applied Surface Science, Vol.252, No.24, 8611-8614, 2006
The effects of Co-metal clusters on exchange bias for Co-doped NiO/FeNi bilayers
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. (c) 2005 Elsevier B.V. All rights reserved.