Coexistence of colossal stress and texture gradients in sputter deposited nanocrystalline ultra-thin metal films


KURU Y. , Welzel U., Mittemeijer E. J.

APPLIED PHYSICS LETTERS, cilt.105, 2014 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 105 Konu: 22
  • Basım Tarihi: 2014
  • Doi Numarası: 10.1063/1.4902940
  • Dergi Adı: APPLIED PHYSICS LETTERS

Özet

This paper demonstrates experimentally that ultra-thin, nanocrystalline films can exhibit coexisting colossal stress and texture depth gradients. Their quantitative determination is possible by X-ray diffraction experiments. Whereas a uniform texture by itself is known to generally cause curvature in so-called sin (2)psi plots, it is shown that the combined action of texture and stress gradients provides a separate source of curvature in sin (2)psi plots (i.e., even in cases where a uniform texture does not induce such curvature). On this basis, the texture and stress depth profiles of a nanocrystalline, ultra-thin (50 nm) tungsten film could be determined. (c) 2014 AIP Publishing LLC.