The local perfection of massive gradient crystals studied by high-energy x-ray diffraction

A. Magerl, K. D. Liss, J. B. Hastings, D. P. Siddons, H. B. Neumann, H. F. Poulsen, U. Rütt, J. R. Schneider, R. Madar

Research output: Contribution to journalLetterpeer-review

4 Scopus citations

Abstract

Structural parameters of bulk crystalline materials can be accessed in a damage-free manner by high-energy X-ray diffraction. Specific parts of the sample can be characterized if they are distinguished by the lattice spacings. This technique is applied for the first time to massive Si1-xGexcrystals with locally varying concentrations x. The data reveal e.g. an unusual lattice distortion with an in-plane expansion and an out-of-plane contraction if the samples are deposited at high temperature (1350 K). This is opposite to a distortion inferred from the difference in the lattice constants of Si and Ge.

Original languageEnglish
Pages (from-to)329-334
Number of pages6
JournalEurophysics Letters
Volume31
Issue number5-6
DOIs
StatePublished - 10 Aug 1995
Externally publishedYes

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