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Comparative Study of Magnetization of Co Thin Films Deposited on Glass, GaAs (001) and Si (001) Substrates |
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PP: 193-197 |
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Author(s) |
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Md. Nahid Akter Shafi,
Md. Abdur Rahim,
Md. Nure Alom Siddiquy,
Md. Kamrul Hasan,
Md. Johurul Islam,
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Abstract |
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| The effect of surface induced anisotropy and interfacial anisotropy on the magnetic properties of Co thin films have been presented. The surface roughness of 100 nm Co film on both the glass and Si (001) substrate is found to be ~ 50 Oe. But the surface roughness of the same thick Co film on GaAs (001) substrate is enhanced to ~ 80 Oe. The enhancement of coercivity of Co thin film on GaAs (001) substrate is due to the special interaction between transition metal Co and GaAs (001). The anisotropy field due to the cobalt silicide interface is responsible for large saturation field required to saturate the Co/Si sample. The squareness of Co thin film on both the glass and GaAs (001) is ~ 1. On the other hand, it is reduced to 0.45 for Co/Si system. Both the surface induced and interfacial anisotropy fields influence the shape of the hysteresis loop. |
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