Ion-irradiation-induced mixing, interface broadening and period dilation in Pt/C multilayers

Ghose, S. K.; Goswami, D. K.; Rout, B.; Dev, B. N.; Kuri, G.; Materlik, G.
July 2001
Applied Physics Letters;7/23/2001, Vol. 79 Issue 4
Academic Journal
Pt/C multilayers of nanometric dimension have been irradiated with 2-MeV-Au ions to a fluence of 1×10[sup 14] ions/cm[sup 2] and analyzed by x-ray reflectivity and x-ray standing wave measurements. The multilayer period has expanded by ∼9%, the expansion of the Pt layers being larger than that of the C layers. Ion-induced displacement of atoms across the interfaces led to an increased interface roughness and an increase of 2 at. % Pt in C layers. Monte Carlo simulations for ion-induced atomic displacement have been used to explain the observed effects. © 2001 American Institute of Physics.


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