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標題: Anomalous exchange bias behavior in ion-beam bombarded NiCo/(Ni,Co)O bilayers
作者: Lin, K.W.
Guo, J.Y.
Liu, H.Y.
Ouyang, H.
Chan, Y.L.
Wei, D.H.
van Lierop, J.
關鍵字: irradiation;fef2-fe
Project: Journal of Applied Physics
期刊/報告no:: Journal of Applied Physics, Volume 103, Issue 7.
The structural and magnetic properties of NiCo/(Ni,Co)O bilayers were investigated. X-ray diffractometry results have shown that the top NiCo layer consisted of a fcc NiCo phase. The bilayer bottom was either a pure (Ni,Co)O or a composite [NiCo+(Ni,Co)O] phase, depending on the percent of O(2)/Ar ratio used during deposition. A double-shifted hysteresis loop exhibiting components that were from positive or negative coupling was observed in the NiCo/(Ni,Co)O (8%O(2)/Ar) bilayers. The microstructural changes, which result from a combination of deposition oxygen content and the ion-beam bombardment, will result in the unusual exchange bias behavior. (c) 2008 American Institute of Physics.
ISSN: 0021-8979
DOI: 10.1063/1.2837502
Appears in Collections:材料科學與工程學系

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