Ion bombardment induced smoothing of amorphous metallic surfaces: Experiments versus computer simulations
- I. Physikalisches Institut, Georg-August-Universitaet Goettingen, Friedrich-Hund-Platz 1, 37077 Goettingen (Germany)
Smoothing of rough amorphous metallic surfaces by bombardment with heavy ions in the low keV regime is investigated by a combined experimental-simulational study. Vapor deposited rough amorphous Zr{sub 65}Al{sub 7.5}Cu{sub 27.5} films are the basis for systematic in situ scanning tunneling microscopy measurements on the smoothing reaction due to 3 keV Kr{sup +} ion bombardment. The experimental results are directly compared to the predictions of a multiscale simulation approach, which incorporates stochastic rate equations of the Langevin type in combination with previously reported classical molecular dynamics simulations [Phys. Rev. B 75, 224107 (2007)] to model surface smoothing across length and time scales. The combined approach of experiments and simulations clearly corroborates a key role of ion induced viscous flow and ballistic effects in low keV heavy ion induced smoothing of amorphous metallic surfaces at ambient temperatures.
- OSTI ID:
- 21143284
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 77, Issue 15; Other Information: DOI: 10.1103/PhysRevB.77.155406; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALUMINIUM ALLOYS
AMBIENT TEMPERATURE
AMORPHOUS STATE
COMPUTERIZED SIMULATION
COPPER ALLOYS
FORECASTING
HEAVY IONS
ION BEAMS
KEV RANGE 01-10
KRYPTON IONS
MOLECULAR DYNAMICS METHOD
ROUGHNESS
SCANNING TUNNELING MICROSCOPY
STOCHASTIC PROCESSES
SURFACES
THIN FILMS
VAPOR DEPOSITED COATINGS
VISCOUS FLOW
ZIRCONIUM ALLOYS