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Ion-beam induced 1D to 3D periodic transformation in nanostructured multilayers by Bera, S.; Satpati, B.; Bhattacharjee, K.; Satyam, P. V.; Dev, B. N. is a scholarly article available to read on EtoBox.

What is Ion-beam induced 1D to 3D periodic transformation in nanostructured multilayers about?

Ion-irradiation-induced modifications of a periodic Pt/C multilayer system containing Fe impurity have been analyzed by transmission electron microscopy (TEM). The multilayer stack with 16 Pt/C layer pairs (period 4.23 nm) was fabricated on a glass substrate. A 2 MeV Au$^{2+}$ ion beam was rastered on the sample to obtain uniformly irradiated strips with fluences from 1$\times10^{14}$ to 1$\times10^{15}$ $ions/cm^2$. Ion-irradiation has been found to cause preferential migration of Fe towards Pt layers [Nucl. Instr. Methods Phys. Res. B212 (2003) 530]. Cross-sectional transmission electron microscopy (XTEM) shows considerable atomic redistribution for irradiation at the highest ion fluence (1$\times10^{15}$ $ions/cm^2$). Individual entities in this structure is like a cluster. Periodic multilayers have periodicity only in the direction normal to the multilayer surface. However, Fourier transform of the XTEM images of the sample irradiated at the highest-fluence shows new off-normal Fourier components of superlattice periodicities arising due to ion irradiation. With a proper understanding of this phenomenon it may be possible to fabricate three dimensional periodic structures of na

Author

Bera, S.; Satpati, B.; Bhattacharjee, K.; Satyam, P. V.; Dev, B. N.

Published

2005

Language

EN