Determination of the interfacial roughness exponent in rare-earth superlattices
The interfacial roughness in Ho/Y and Ho/Lu superlattices has been studied using high-resolution x-ray diffraction. The transverse width of the superlattice Bragg peaks broadens almost linearly as a function of the component of the reduced wave vector parallel to the growth direction, while the line...
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Veröffentlicht in: | Physical review letters 1994-10, Vol.73 (16), p.2232-2235 |
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creator | Swaddling, PP McMorrow, DF Cowley, RA Ward, RC Wells, MR |
description | The interfacial roughness in Ho/Y and Ho/Lu superlattices has been studied using high-resolution x-ray diffraction. The transverse width of the superlattice Bragg peaks broadens almost linearly as a function of the component of the reduced wave vector parallel to the growth direction, while the line shape is invariant, and is described by a Lorentzian raised to the power of [approx]5/2. These results are interpreted as a signature of conformally rough interfaces, and the roughness exponent is determined to be [alpha]=0.85[plus minus]0.05. It is also shown how [alpha] may be altered by adjusting the growth conditions. |
doi_str_mv | 10.1103/PhysRevLett.73.2232 |
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The transverse width of the superlattice Bragg peaks broadens almost linearly as a function of the component of the reduced wave vector parallel to the growth direction, while the line shape is invariant, and is described by a Lorentzian raised to the power of [approx]5/2. These results are interpreted as a signature of conformally rough interfaces, and the roughness exponent is determined to be [alpha]=0.85[plus minus]0.05. It is also shown how [alpha] may be altered by adjusting the growth conditions.</abstract><cop>United States</cop><pmid>10057006</pmid><doi>10.1103/PhysRevLett.73.2232</doi><tpages>4</tpages></addata></record> |
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subjects | 360102 - Metals & Alloys- Structure & Phase Studies 665100 - Nuclear Techniques in Condensed Matter Physics - (1992-) BREMSSTRAHLUNG COHERENT SCATTERING CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY DIFFRACTION ELECTROMAGNETIC RADIATION ELEMENTS EPITAXY HOLMIUM INTERFACES LINE WIDTHS LUTETIUM MATERIALS SCIENCE METALS MOLECULAR BEAM EPITAXY MORPHOLOGY RADIATIONS RARE EARTHS ROUGHNESS SCATTERING SUPERLATTICES SURFACE PROPERTIES SYNCHROTRON RADIATION TRANSITION ELEMENTS X-RAY DIFFRACTION YTTRIUM |
title | Determination of the interfacial roughness exponent in rare-earth superlattices |
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