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Title: Bombardment-Induced Tunable Superlattices in the Growth of Au-Ni Films

Abstract

Highly ordered superlattices are typically created through the sequential deposition of two different materials. Here, we report our experimental observation of spontaneous formation of superlattices in coevaporation of Au and Ni under energetic ion bombardment. The superlattice periodicities are on the order of a few nanometers and can be adjusted through the energy and flux of ion beams. Such a self-organization process is a consequence of the bombardment-induced segregation and uphill diffusion within the advancing nanoscale subsurface zone in the film growth. Our observations suggest that ion beams can be employed to make tunable natural superlattices in the deposition of phase-separated systems with strong bombardment-induced segregation.

Authors:
; ; ; ;  [1]
  1. Naval Research Laboratory, Washington, DC 20375 (United States)
Publication Date:
OSTI Identifier:
20778601
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 96; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevLett.96.056105; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CRYSTAL GROWTH; DEPOSITION; GOLD; ION BEAMS; NANOSTRUCTURES; NICKEL; PERIODICITY; SEGREGATION; SUPERLATTICES; TAIL IONS; THIN FILMS

Citation Formats

He, J.H., Carosella, C.A., Hubler, G.K., Qadri, S.B., and Sprague, J.A. Bombardment-Induced Tunable Superlattices in the Growth of Au-Ni Films. United States: N. p., 2006. Web. doi:10.1103/PHYSREVLETT.96.0.
He, J.H., Carosella, C.A., Hubler, G.K., Qadri, S.B., & Sprague, J.A. Bombardment-Induced Tunable Superlattices in the Growth of Au-Ni Films. United States. doi:10.1103/PHYSREVLETT.96.0.
He, J.H., Carosella, C.A., Hubler, G.K., Qadri, S.B., and Sprague, J.A. Fri . "Bombardment-Induced Tunable Superlattices in the Growth of Au-Ni Films". United States. doi:10.1103/PHYSREVLETT.96.0.
@article{osti_20778601,
title = {Bombardment-Induced Tunable Superlattices in the Growth of Au-Ni Films},
author = {He, J.H. and Carosella, C.A. and Hubler, G.K. and Qadri, S.B. and Sprague, J.A.},
abstractNote = {Highly ordered superlattices are typically created through the sequential deposition of two different materials. Here, we report our experimental observation of spontaneous formation of superlattices in coevaporation of Au and Ni under energetic ion bombardment. The superlattice periodicities are on the order of a few nanometers and can be adjusted through the energy and flux of ion beams. Such a self-organization process is a consequence of the bombardment-induced segregation and uphill diffusion within the advancing nanoscale subsurface zone in the film growth. Our observations suggest that ion beams can be employed to make tunable natural superlattices in the deposition of phase-separated systems with strong bombardment-induced segregation.},
doi = {10.1103/PHYSREVLETT.96.0},
journal = {Physical Review Letters},
number = 5,
volume = 96,
place = {United States},
year = {Fri Feb 10 00:00:00 EST 2006},
month = {Fri Feb 10 00:00:00 EST 2006}
}