Influence of ferromagnetic layer on the exchange coupling of antiferromagnetic NiO-based films |
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Authors: | S Guo W LiuXH Liu WJ GongJN Feng ZD Zhang |
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Institution: | Shenyang National Laboratory for Materials Science and International Centre for Materials Physics, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, PR China |
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Abstract: | Strong effects of ferromagnetic layer (FMCo, and Ni80Fe20) on the magnitude and blocking temperature of exchange coupling are observed in antiferromagnetic NiO-based films NiO (5 nm)/FM1 (t nm)/FM2 (6-t nm). The existence of interfacial spins configuration in glass-like state and FM anisotropy are proposed to interpret a minimum shown in thermal magnetization curves for films with strong exchange coupling effect. The microstructural change of FM layer and the long-range interaction of exchange bias are taken into account to explain a strong dependence of exchange coupling energy density on the thickness tF of FM layer when tF<5 nm. |
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Keywords: | Exchange bias Blocking temperature Thickness Interface Interlayer |
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