Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 6 of 6 for “"modulated structures"”.
-
Modulation of Incommensurately Modulated Structures Studied by the Maximum Entropy Method
In this thesis, modulated properties of incommensurately modulated crystals are studied by the Maximum Entropy Method (MEM). This was done exemplarily on the compounds Rubidium tetrachlorozincate and Chromium pyrophosphate. To do so, the MEM derived (3+1)-dimensional superspace electron density was …
-
Novel Phenomena Induced by Magnon-Magnon and Magnon-Spin Coupling
… of novel topological phases in magnonic band structures represents a new opportunity for the development of spintronics and magnonics with low power consumption. While several approaches have been proposed for generating topological magnonic surface states, they usually require materials with …
-
Photonic Crystals with Alternate Arrays of Rods and Holes in a Low Dielectric-Index Material
… waves (light beams) in periodically modulated dielectric material structures based on Maxwell’s equations. We are interested in novel light propagation characteristics in these man-made dielectric material structures for practical applications, especially on optical communications and …
-
The potential for superlattice precipitate reinforcement in titanium-iron alloys
… Ti-Fe-Al alloys leads to a range of nanoscale modulated structures that form by apparent decomposition of the BCC phase, resulting in hierarchical microstructures, and very high hardness. These effects are explored in Chapter 7. The findings reveal opportunities for exploring alternative design …
-
Quadratische Netze, Fehlstellen und Modulationen - Strukturchemie von Polyseleniden und Selenidditelluriden der Lanthanoidmetalle
In der vorliegenden Arbeit wurden Verbindungen untersucht, die reguläre oder verzerrte planar-quadratische Chalkogenschichten als ein wesentliches Strukturelement enthalten. Neben der Darstellung neuer Verbindungen und der Identifizierung des Phasenbestandes in den binären Zustandsdiagrammen Ln – …
-
Crystal Structures of Perovskite-related Can(Nb,Ti)nO3n+2 (n=5 and 6)
In this thesis, the crystal structures at room temperature of perovskite-related materials belonging to the homologous series Can(Nb,Ti)nO3n+2 with n = 5 and 6 have been accurately determined by single-crystal X-ray diffraction. The three compounds Ca5Nb5O17 (n = 5), Ca5Nb4TiO17 (n = 5), and …