Lattice site location in metal hydride thin films: Ion channeling and phononic properties

• We investigate the relationship between lattice vibrations and ion channeling in hydrogenated strained thin V films within Fe/V- and Cr/V-superlattices, performing 15N-ion channeling experiments and Monte-Carlo simulations with the program FLUX7. Comparing simulated 15N-nuclear encounter probabilities (NEP) to Fe/V-atoms to the yield of backscattered 15N-ions demonstrates a correlation between the influence of beam divergence and Debye temperatures and provides insights into distinguishing them quantitatively from planar channeling patterns. Simulations of 15N-NEP to interstitial hydrogen and comparison to 1H(15N, αγ)12C nuclear reaction yield highlights the importance of analyzing multiple crystal symmetries to determine vibrational motions and impurity site locations accurately. The analysis of thermal vibrational motions in hydrogenated Fe/V- and CrV-superlattices reveal a reduction in Debye temperatures for Fe/V- and CrV-superlattices, emphasizing the influence of defect, surface, and interface effects on lattice vibrations.

Ämnesord

NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)

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