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Degree of chemical reaction of carbon and oxygen to ferromagnetic grains for Co-based alloy-oxide granular structure by Shingo Sasaki; Shin Saito; Migaku Takahashi is a Materials Science article available to read on EtoBox.

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The saturation magnetization factor, M s , was investigated for a Co-based alloy-oxide granular film through the quantitative analysis of film composition and phase formation. Using a carbon cap layer deposited directly onto the Co-SiO 2 film, both oxidation and carbonization of cobalt caused a reduction in M s . The composition of the granular film strongly affects M s , because the Ar gas pressure and discharge power during Co-SiO 2 sputtering alters the Co and oxygen content in the film. In particular, for a film fabricated under a high Ar gas pressure such as 8.0 Pa, M s was significantly decreased, due to the formation of the antiferromagnetic CoO phase.

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Author

Shingo Sasaki; Shin Saito; Migaku Takahashi

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0304-8853)

Published

2008

Language

EN

Field

Materials Science (Physical Sciences)