1. Exchange coupling and NOL magnetism consideration in Co1-xFex specular spin-valves
- Author
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Doi, M., Izumi, M., Abe, Y., Fukuzawa, H., Fuke, H.N., Iwasaki, H., and Sahashi, M.
- Subjects
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MAGNETIZATION , *OXIDATION , *FERROMAGNETISM , *MAGNETISM - Abstract
Abstract: To confirm the origin of the exchange coupling through the nano-oxide layer (NOL), the detailed analyses of the magnetization curve and the temperature dependence on magnetization for the Co1-xFex-NOL samples with various oxidation processes are investigated. The field cooling effect is observed for NOL-inserted samples, which suggests the existence of the antiferromagnetic (AFM) component in the NOL. The characteristic temperature (blocking temperature) increases with increase in the Fe content for Co1-xFex(x=0.08,0.17,0.26)-NOL. These results support that NOL pinning appears higher than room temperature. Further, the twisted coupling through the NOL observed for the Co0.50Fe0.50-NOL is discussed from the viewpoint of the magnetic roughness due to the ferrimagnetic nature of the very thin NOL in specular spin valve (SPSV). [Copyright &y& Elsevier]
- Published
- 2005
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