Dokumente Fakultät für Physik (inkl. GAUSS) nach Gutachter "Kirchheim, Reiner Prof. Dr."
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Characterization of the electronic properties of LaIrIn5: calculations, transport-, heat capacity- and de Haas-van Alphen-experiments
(2007-02-26)The system LaIrIn5 constitutes the reference model for the 115-class of rare-earth intermetallic compounds. Some of them are heavy-fermion systems showing, besides superconductivity and magnetism, anomalous conduction ... -
Charakteristische Eigenschaften laserdeponierter Poly(methyl-methacrylat)-Filme
(2005-05-20)Over the last decades polymeric thin films have shown their growing importance for applications. In this contribution, the properties of pulsed UV-laserdeposited (PLD) poly (methyl ... -
Computer Simulations for Hydrogen Loaded Palladium Clusters
(2007-08-07)In this work, a new expression for the chemical potential μ of H in Pd is used, which relies on an extension of Widom's particle insertion method. Being an exact expression, this μ contains ... -
Dünne Palladium-Wasserstoff-Schichten als Modellsystem: Thermodynamik struktureller Phasenübergänge unter elastischen und mikrostrukturellen Zwangsbedingungen
(2015-07-07)Using the formation of a hydride phase in palladium-hydrogen thin films with 5 nm to 2000 nm thickness as a model, this work investigates the impact of film thickness as well as microstructural and elastic constraints on ... -
Einfluss von gelöstem Wasserstoff auf die Versetzungsbildung bei plastischer Verformung von Metallen
(2016-03-11)Dissolved hydrogen in metals leads in many cases to a reduction in the quality of mechanical properties. There are many effects that can be attributed to the solution of hydrogen. These are collectively referred to as ... -
Extended TOF-SIMS analysis on low-nickel austenitic stainless steels: The influence of oxide layers on hydrogen embrittlement
(2016-01-18)Hydrogen embrittlement (HE) of low-nickel austenitic stainless steels were studied with special attention to the impact of the microstructural properties such as strain induced α’-martensite, grain size, dislocation density ... -
Feldinduzierte Tieftemperaturoxidation nanoskaliger Metall- und Halbleiterstrukturen
(2008-12-04)At the surface of almost all metals and semiconductors oxide formation occurs when exposed to atmosphere. The oxidation reaction proceeds along a number of partial reaction steps with the ... -
Freie Enthalpie binärer metallischer Legierungsschmelzen: Molekulardynamik Simulationen für NixZr1-x
(2005-01-31)A method to determine the free enthalpy of molecular dynamics simulated binary alloy melts is introduced. Here, first the entropy and free enthalpy of the ordered, intermetallic crystalline A x B 1-x - phases are ... -
Heterogene Interdiffusion von nanokristallinen Cu/Co/Au-Schichten
(2002-01-30)The interdiffusion of Cu/Au-thin films is investigated using several analytical and microscopical methods of high resolution. The main part of the experiments was carried out by means of ... -
Hydrogen absorption property of nanocrystalline-magnesium films
(2016-11-07)The purpose of this study is to investigate hydrogen absorption properties of grain boundary rich pure magnesium film. X-ray diffraction (XRD) measurements has been carried out to estimate microstructures, texture, lattice ... -
Hydrogen diffusion and hydride formation in grain boundary rich magnesium
(2019-05-06)In the last decade Magnesium (Mg) has attracted much interest as a storage material for hydrogen in a future hydrogen energy based economy. The reasons are its high reversible hydrogen capacity of up to 7,6 wt% and its ... -
Hydrogen in V-Fe thin films and Fe/V-Fe multi-layered thin films
(2011-11-25)In this thesis, hydrogen induced biaxial stress and local distribution of hydrogen in V-Fe films and V-Fe/Fe multi-layered films were investigated. The stress development and stress relaxation ... -
<i>C</i><sub>60</sub> as a template for the creation of metal and semiconductor nanoclusters
(2006-01-24)Due to their spherical shape, thin films made up of C60 fullerene molecules have a highly corrugated surface. This provides a large number of natural defects, which could provide nucleation ... -
In situ studies on palladium/rutile titanium dioxide exposed to low pressure hydrogen gas environments
(2018-11-12)The interaction of hydrogen gas with the palladium/rutile titanium dioxide model system was investigated with strong focus on the interface and its vicinity. Palladium (Pd) films were deposited on pretreated rutile titanium ... -
Interlayer effect on the hydrogen uptake in Vanadium films: Stress development, surface topography and optical behavior changes
(2023-07-13)The purpose of this study is to investigate hydrogen absorption-related properties changes of nanocrystalline thin films by varying the elastic constraints condition. The elastic constraint condition is varied by using ... -
Investigation of the Amorphization of iron and austenitic stainless steel films by supersaturation with Boron, Carbon, Nitrogen and Oxygen
(2008-12-10)This work investigates the amorphization behavior of Fe-based alloys and the formation of metallic glasses based on conventional.It is well known, that small additions of alloying elements ... -
Korrelationen zwischen struktureller Ordnung und elektrischen Transporteigenschaften in CoFeB|MgO|CoFeB Tunnelmagnetowiderstandselementen
(2010-10-19)Magnetic tunnel junctions with amorphous ferromagnetic CoFeB electrodes and a crystalline MgO Barrier show a very high tunnel magnetoresistance (TMR). In epitaxial systems of Fe/MgO/Fe(001) ... -
Mechanical Properties of Icosahedral Viral Shells. A Molecular Dynamics Study
(2009-04-03)The mechanical properties of viral shells are crucial for viral assembly and infection. To study their distribution and heterogeneity on the viral surface, we have carried out atomistic ... -
Mikrostrukturänderungen durch hohe elektrische Stromdichten in Eisen-Kohlenstoff Dünnschichten
(2021-08-11)Processing of materials with high electric and magnetic fields is a growing topic in material science. Yet, the interactions of fields and currents are complex and not fully understood. Therefore, the impact of high direct ... -
Mikrostrukturelle Untersuchungen an Mangan-dotiertem Galliumnitrid mittels fortgeschrittener Methoden der hochauflösenden und analytischen Transmissionselektronenmikroskopie
(2006-12-06)The magnetic properties of a diluted magnetic semiconductor depend on the microstructure of the material. In this work transmission electron microscopy was applied to Mn-doped GaN to ...