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Orientation dependence of swift heavy ion track formation in potassium titanyl phosphate

Ma, Yu Jie ; Santiago, Pablo Mota LU ; Rodriguez, Matias D. ; Kremer, Felipe ; Schauries, Daniel ; Afra, Boshra ; Bierschenk, Thomas ; Llewellyn, David J. ; Lu, Fei and Ridgway, Mark C. , et al. (2016) In Journal of Materials Research 31(15). p.2329-2336
Abstract

Potassium titanyl phosphate crystals in both x-cut and z-cut were irradiated with 185 MeV Au ions. The morphology of the resulting ion tracks was investigated using small angle x-ray scattering (SAXS), transmission electron microscopy (TEM), and atomic force microscopy (AFM). SAXS measurements indicate the presence of cylindrical ion tracks with abrupt boundaries and a density contrast of 1 ± 0.5% compared to the surrounding matrix, consistent with amorphous tracks. The track radius depends on the crystalline orientation, with 6.0 ± 0.1 nm measured for ion tracks along the x-axis and 6.3 ± 0.1 nm for those along the z-axis. TEM images in both cross-section and plan-view show amorphous ion tracks with radii comparable to those determined... (More)

Potassium titanyl phosphate crystals in both x-cut and z-cut were irradiated with 185 MeV Au ions. The morphology of the resulting ion tracks was investigated using small angle x-ray scattering (SAXS), transmission electron microscopy (TEM), and atomic force microscopy (AFM). SAXS measurements indicate the presence of cylindrical ion tracks with abrupt boundaries and a density contrast of 1 ± 0.5% compared to the surrounding matrix, consistent with amorphous tracks. The track radius depends on the crystalline orientation, with 6.0 ± 0.1 nm measured for ion tracks along the x-axis and 6.3 ± 0.1 nm for those along the z-axis. TEM images in both cross-section and plan-view show amorphous ion tracks with radii comparable to those determined from SAXS analysis. The protruding hillocks covering the sample surface detected by AFM are consistent with a lower density of the amorphous material within the ion tracks compared to the surrounding matrix. Simulations using an inelastic thermal-spike model indicate that differences in the thermal conductivity along the z- and x-axis can partially explain the different track radii along these directions.

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publishing date
type
Contribution to journal
publication status
published
subject
keywords
defects, ion-solid interactions
in
Journal of Materials Research
volume
31
issue
15
pages
8 pages
publisher
Materials Research Society
external identifiers
  • scopus:84969217999
ISSN
0884-2914
DOI
10.1557/jmr.2016.184
language
English
LU publication?
no
additional info
Publisher Copyright: © Materials Research Society 2016.
id
36ddd791-068c-467a-8df7-e9560e345230
date added to LUP
2023-04-05 16:14:02
date last changed
2023-05-30 10:32:29
@article{36ddd791-068c-467a-8df7-e9560e345230,
  abstract     = {{<p>Potassium titanyl phosphate crystals in both x-cut and z-cut were irradiated with 185 MeV Au ions. The morphology of the resulting ion tracks was investigated using small angle x-ray scattering (SAXS), transmission electron microscopy (TEM), and atomic force microscopy (AFM). SAXS measurements indicate the presence of cylindrical ion tracks with abrupt boundaries and a density contrast of 1 ± 0.5% compared to the surrounding matrix, consistent with amorphous tracks. The track radius depends on the crystalline orientation, with 6.0 ± 0.1 nm measured for ion tracks along the x-axis and 6.3 ± 0.1 nm for those along the z-axis. TEM images in both cross-section and plan-view show amorphous ion tracks with radii comparable to those determined from SAXS analysis. The protruding hillocks covering the sample surface detected by AFM are consistent with a lower density of the amorphous material within the ion tracks compared to the surrounding matrix. Simulations using an inelastic thermal-spike model indicate that differences in the thermal conductivity along the z- and x-axis can partially explain the different track radii along these directions.</p>}},
  author       = {{Ma, Yu Jie and Santiago, Pablo Mota and Rodriguez, Matias D. and Kremer, Felipe and Schauries, Daniel and Afra, Boshra and Bierschenk, Thomas and Llewellyn, David J. and Lu, Fei and Ridgway, Mark C. and Kluth, Patrick}},
  issn         = {{0884-2914}},
  keywords     = {{defects; ion-solid interactions}},
  language     = {{eng}},
  month        = {{08}},
  number       = {{15}},
  pages        = {{2329--2336}},
  publisher    = {{Materials Research Society}},
  series       = {{Journal of Materials Research}},
  title        = {{Orientation dependence of swift heavy ion track formation in potassium titanyl phosphate}},
  url          = {{http://dx.doi.org/10.1557/jmr.2016.184}},
  doi          = {{10.1557/jmr.2016.184}},
  volume       = {{31}},
  year         = {{2016}},
}