2006/05/23 by P. Süle, Süle, P., M. Menyhárd +1 · 1 citation
Engineering · Materials Science · Physics and Astronomy · #Advanced Materials Characterization Techniques #FOS: Physical sciences #High Temperature Alloys and Creep #Materials Science (cond-mat.mtrl-sci) #Microstructure and mechanical properties #cond-mat.mtrl-sci
paper · pdf · doi:10.48550/arxiv.cond-mat/0605566
8 pages, 4 figures, RevTex format
openalex publication_date 2006/05/23 · arxiv created 2006/10/25 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The ion-sputtering induced transient enhanced intermixing has been studied by molecular dynamics (MD) simulations in Pt/Ti and its anomalous nature has been explained as a superdiffusive transient enhanced interdiffusion. We find ballistic mixing and a robust mass effect in Pt/Ti. The sum of the square of atomic displacements (<R2>) asymptotically grows nonlinearily and scales as N2 and ∼ t2, where N and t are the ion-number fluence and the time of ion-sputtering, respectively. This anomalous behavior explains the high diffusity tail in the concentration profile obtained by Auger electron spectroscopy depth profiling (AES-DP) analysis in Pt/Ti/Si substrate (Pt/Ti) multilayer. In Ta/Ti/Pt/Si multilayer we find a linear time scaling of <R2 > ∝ t at the Ti/Pt interface indicating the suppression of superdiffusive features. We propose a qualitative explanation based on the accelerative effect of nonlinear forces provbided by the anharmonic host lattice.