Approach to thermal roughening of Ni(110): A study by high-resolution low-energy electron diffraction
- 22 January 1990
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 64 (4) , 447-450
- https://doi.org/10.1103/physrevlett.64.447
Abstract
We present high-q resolution low-energy electron diffraction results of the approach to thermal roughening of the Ni(110) surface. The process is found to occur in two reversible steps. At temperatures above 900 K vibrations become a significant fraction of the bond length and a large anharmonicity in the vibrational amplitude appears. A large asymmetry between in- and out-of-plane vibrations exists, causing the off-specular diffraction peaks to decay rapidly to zero. Finally, near 1200 K, a significant density of vacancies begins to form. Above 1300 K the surface roughens.Keywords
This publication has 19 references indexed in Scilit:
- High q-resolution electron gun for low energy electron diffractionReview of Scientific Instruments, 1989
- No Thermal Roughening on Cu(110) up to 900 KPhysical Review Letters, 1989
- Energy resolved measurements of the diffuse scattering near the roughening transition of Ni(113)Surface Science, 1988
- X-Ray Scattering Studies of the Melting of Lead SurfacesPhysical Review Letters, 1988
- Kosterlitz-Thouless roughening at the Ni(113) surfaceSurface Science, 1987
- Thermal roughening of the copper (110) surface: An x-ray diffraction experimentPhysical Review Letters, 1987
- Observation of Surface MeltingPhysical Review Letters, 1985
- Surface Lattice Dynamics of Silver. II. Low-Energy Electron Thermal Diffuse ScatteringPhysical Review B, 1967
- Surface Lattice Dynamics of Silver. I. Low-Energy Electron Debye-Waller FactorPhysical Review B, 1966
- Measurement of the thermal variation of the X-ray Debye temperature of pure nickel and chromiumActa Crystallographica, 1966