The effect of the strong centrifugal force, mega-gravity (MG) on interdiffusion between Au and Cu thin films was studied by using Au(60 nm)/Cu(500 nm)/α-Al2O3 (0001) films. The Rutherford backscattering analysis of the Au and Cu depth profiles shows that Cu atoms diffuse through the Au layer, resulting in the formation of the Cu layer on the surface under both the thermal annealing at 220C and the application of 0.61 x 106G at 220C. The results indicate that the MG application enhances the layer thickness of the Cu layer on the surface.

RBS Study of Diffusion under Strong Centrifugal Force in Bimetallic Au/Cu Thin Films. T.Hao, M.Ono, S.Okayasu, S.Sakai, K.Narumi, Y.Hiraiwa, H.Naramoto, Y.Maeda: Nuclear Instruments and Methods in Physics Research Section B, 2010, 68[11-12], 1867-70