| Partner: Marcin Sarzyński |
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Ostatnie publikacje
| 1. | Domagała J.Z.♦, Morelhão S.L.♦, Sarzyński M.♦, Maździarz M., Dłużewski P., Leszczyński M.♦, Hybrid reciprocal lattice: application to layer stress determination in GaAlN/GaN(0001) systems with patterned substrates, JOURNAL OF APPLIED CRYSTALLOGRAPHY, ISSN: 1600-5767, DOI: 10.1107/S1600576716004441, Vol.49, No.3, pp.798-805, 2016 Streszczenie: Epitaxy of semiconductors is a process of tremendous importance in applied science and in the optoelectronics industry. The control of defects introduced during epitaxial growth is a key point in manufacturing devices of high efficiency and durability. In this work, it is demonstrated how useful hybrid reflections are for the study of epitaxial structures with anisotropic strain gradients due to patterned substrates. High accuracy in detecting and distinguishing elastic and plastic relaxations is one of the greatest advantages of measuring this type of reflection, as well as the fact that the method can be exploited in a symmetric reflection geometry on a commercial high-resolution diffractometer. Słowa kluczowe: optoelectronics, Group III-nitride semiconductors, epitaxial growth, X-ray multiple diffraction, interface defects Afiliacje autorów:
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Prace konferencyjne
| 1. | Maciejewski G., Sarzyński M.♦, Domagała J.Z.♦, Leszczyński M.♦, A new method of strain determination in partially relaxed thin films, EDS 2006, International Conference on Extended Defects in Semiconductors, 2006-09-17/09-22, Halle (GE), DOI: 10.1002/pssc.200675497, Vol.4, No.8, pp.3048-3055, 2007 Streszczenie: It is well known that classical Stoney's formula for radius of thin film bowing fails when thin film is dislocated. Thereby, a method of determination lattice parameters for each of heterostructure epilayers is needed when inelastic relaxation takes place. In this article, we have developed a method of determination lattice parameters of a heterostructure from radius curvature measurement data. Description of deformation when dislocations are nucleated is carefully analyzed. It is shown that in order to take into account nucleated dislocations in thin film an additional term responsible for increased volume of layers should be included in the analysis. The proposed method is based on the finite deformation elasticity and uses the finite element method and bowing radius measurement by the laser beam reflection method. As an example the nitride alloy heterostructure with GaN as a substrate is analyzed. The verification is performed using X-ray measurement of lattice parameters. A very good correspondence between numerically determined lattice parameters and XRD measurements data are observed. Afiliacje autorów:
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Abstrakty konferencyjne
| 1. | Pawłowski P., Płatek P.♦, Sarzyński M.♦, Kaźmierczak K.♦, Suwała G., Frąś T.♦, Janiszewski J., Mechanical response of additively manufactured 2D regular cellular structures made of MS1 steel powder subjected to uniaxial loading tests, AMT 2018, IUTAM Symposium on Mechanical design and analysis for AM technologies, 2018-08-20/08-25, Moskwa (RU), pp.1-4, 2018 |  |