Dokumente Fakultät für Physik (inkl. GAUSS) nach Gutachter "Samwer, Konrad Prof. Dr."
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Multilagenzonenplatten für die Mikroskopie mit harter Röntgenstrahlung
(2016-08-02)X-ray microscopy is due to the small wavelength and high penetration depth an auspicious technique for improved investigations of materials on nm-scale. For this, multilayer zone plates (MZP) with well-defined and smooth ... -
Nanotribologische Untersuchungen an Dünnschicht-Manganaten: Phononische Beiträge zur Reibung auf der Nanometerskala
(2018-01-31)Even though friction is often described by straight-forward empirical laws, its fundamental cause is by no means simple. Many of the fundamental excitations at the nanoscale contact are strongly coupled making it challenging ... -
Nonlinear Response and Avalanche Behavior in Metallic Glasses
(2017-08-29)The response to different stress amplitudes at temperatures below the glass transition temperature is measured by mechanical oscillatory excitation of Pd40Ni40P20 metallic glass samples in single cantilever bending geometry. ... -
Physics of laser heated ferromagnets: Ultrafast demagnetization and magneto-Seebeck effect
(2012-07-16)Including the spin degree of freedom into electronic circuits e.g. as non-volatile memory devices, requires the exact knowledge of the speed with which writing information is possible. All-optical pump-probe experiments ... -
Reibung kristalliner, amorpher und stark korrelierter Systeme unter aktiver Kontrolle
(2018-08-09)Mechanical and kinetic energy is transferred into heat if to two bodies slide on each other. This energy dissipative process is usually called friction. This thesis contributes to the understanding of friction. This is ... -
Relaxationen in komplexen Fluiden
(2010-12-20)Relaxation processes of complex fluids show a significant aspect for understanding of metallic glasses as well as polymers. Therefore, the interpretation of the macroscopic features due to ... -
Spannungsinduzierte Wellenbildung in laserdeponierten Polymer/Metall-Systemen
(2014-07-24)Multilayer thin films with dimensions at the nanometer scale represent a technologically important class of materials where the interface and size effects play an important role. Interestingly, when polymer/metal multilayers ... -
Structural and Magnetic Properties of the Glass-Forming Alloy Nd60Fe30Al10
(2005-02-28)Structural and thermophysical investigations on multicomponent bulk metallic glasses have been intensively carried out since their discovery in 1990. Since then, particular attention has been paid to the chemical and ... -
Structure and Dynamics of Molecular-Dynamics Simulated Undercooled Ni-Zr-Al Melts
(2001-08-30)Molecular dynamics (MD) simulations are used in this work to model the massive-metallic-glass forming Ni25Zr60Al15 alloy. The applied atomic interaction model predicts radial distribution functions for the glass that ... -
Thermodynamic and kinetic properties of metallic glasses during ultrafast heating
(2015-05-18)When a system is cooled from the high temperature liquid state below its liquidus temperature, the dynamics of the system start to deviate from the ones in the equilibrium high temperature liquid. There are a number of ... -
Untersuchung des elektrischen Widerstandsschaltens perowskitischer Manganatfilme auf der Nanometerskala
(2012-07-25)Perovskite manganese oxides are highly correlated systems, which exhibit a variety of resistance effects under different stimuli. Under exceeding critical voltages or currents, abrupt changes of the electrical resistance ... -
Untersuchungen zur Polymerdynamik an laserdeponierten Poly(alkyl methacrylat)-Filmen
(2010-04-06)Pulsed Laser Deposition is an extremely versatile method for preparation of thin films of a wide range of material classes. The associated ablation mechanisms are very complex - especially ... -
Verformungsinduzierte Strukturänderungen bei amorphem Ni0.5Zr0.5 in Molekulardynamik-Simulationen
(2006-11-27)The present work investigates the plastic deformation of metallic glasses by the aid of molecular-dynamic simulations. The parameters for the model system are adapted to those for a NiZr-alloy. ... -
Wachstum amorpher Schichten: Vergleich von Experiment und Simulation im Bereich Oberflächenrauhigkeit und mechanische Spannungen
(2001-07-04)Structure formation and mechanical stresses of amorphous and polycrystal films, prepared by evaporation, sputtering and PLD, are investigated, and modelled with the help of Monte-Carlo ... -
Wachstum metallischer Nanoclustern auf Polymeroberflächen
(2005-04-22)Growth and properties of metallic nanoclusters on polymer surfaces lead to interesting physical questions. At the same time clusters on polymers have a high potential with regard to technical ... -
Wachstumsanalyse amorpher dicker Schichten und Schichtsysteme
(2004-07-14)Based on a stochastic partial differential equation, surface morphology evolution of growing amorphous thin films can be described. For enhancement and verification of the applicability to ...